Update to Dart `1.20.0-dev.1.0`. (#5689)

* Udpate to Dart `1.20.0-dev.1.0`.

Udpate to Dart `1.20.0-dev.1.0` and corresponding `analyzer` package.

* Added `--no-packages-dir`.

* Revert extension to master.

* Added ignores.

* Review nits.

* More nits.

bin/cache/dart-sdk.version

-1.19.0-dev.5.0
+1.20.0-dev.1.0

examples/flutter_gallery/lib/demo/animation_demo.dart

@@ -189,7 +189,7 @@ class _PointDemoState extends State<_PointDemo> {
     return new RawGestureDetector(
       behavior: _dragTarget == null ? HitTestBehavior.deferToChild : HitTestBehavior.opaque,
       gestures: <Type, GestureRecognizerFactory>{ 
-        ImmediateMultiDragGestureRecognizer: (ImmediateMultiDragGestureRecognizer recognizer) {
+        ImmediateMultiDragGestureRecognizer: (ImmediateMultiDragGestureRecognizer recognizer) { // ignore: map_value_type_not_assignable, https://github.com/flutter/flutter/issues/5771
           return (recognizer ??= new ImmediateMultiDragGestureRecognizer())
             ..onStart = _handleOnStart;
         }
@@ -359,7 +359,7 @@ class _RectangleDemoState extends State<_RectangleDemo> {
     return new RawGestureDetector(
       behavior: _dragTarget == null ? HitTestBehavior.deferToChild : HitTestBehavior.opaque,
       gestures: <Type, GestureRecognizerFactory>{
-        ImmediateMultiDragGestureRecognizer: (ImmediateMultiDragGestureRecognizer recognizer) {
+        ImmediateMultiDragGestureRecognizer: (ImmediateMultiDragGestureRecognizer recognizer) { // ignore: map_value_type_not_assignable, https://github.com/flutter/flutter/issues/5771
           return (recognizer ??= new ImmediateMultiDragGestureRecognizer())
             ..onStart = _handleOnStart;
         }

examples/flutter_gallery/lib/demo/expansion_panels_demo.dart

@@ -185,7 +185,7 @@ class _ExpansionPanelsDemoState extends State<ExpasionPanelsDemo> {
         value: 'Caribbean cruise',
         hint: 'Change trip name',
         valueToString: (String value) => value,
-        builder: (DemoItem<String> item) {
+        builder: (DemoItem<String> item) { // ignore: argument_type_not_assignable, https://github.com/flutter/flutter/issues/5771
           void close() {
             setState(() {
               item.isExpanded = false;
@@ -216,7 +216,7 @@ class _ExpansionPanelsDemoState extends State<ExpasionPanelsDemo> {
         value: _Location.Bahamas,
         hint: 'Select location',
         valueToString: (_Location location) => location.toString().split(".")[1],
-        builder: (DemoItem<_Location> item) {
+        builder: (DemoItem<_Location> item) { // ignore: argument_type_not_assignable, https://github.com/flutter/flutter/issues/5771
           void close() {
             setState(() {
               item.isExpanded = false;
@@ -278,7 +278,7 @@ class _ExpansionPanelsDemoState extends State<ExpasionPanelsDemo> {
         value: 80.0,
         hint: 'Select amount of sun',
         valueToString: (double amount) => '${amount.round()}',
-        builder: (DemoItem<double> item) {
+        builder: (DemoItem<double> item) { // ignore: argument_type_not_assignable, https://github.com/flutter/flutter/issues/5771
           void close() {
             setState(() {
               item.isExpanded = false;

examples/flutter_gallery/lib/demo/leave_behind_demo.dart

@@ -143,7 +143,7 @@ class LeaveBehindDemoState extends State<LeaveBehindDemo> {
                 value: LeaveBehindDemoAction.reset,
                 child: new Text('Reset the list')
               ),
-              new PopupMenuDivider(),
+              new PopupMenuDivider(), // ignore: list_element_type_not_assignable, https://github.com/flutter/flutter/issues/5771
               new CheckedPopupMenuItem<LeaveBehindDemoAction>(
                 value: LeaveBehindDemoAction.horizontalSwipe,
                 checked: _dismissDirection == DismissDirection.horizontal,

examples/flutter_gallery/lib/demo/menu_demo.dart

@@ -140,7 +140,7 @@ class MenuDemoState extends State<MenuDemo> {
                     title: new Text('Get link')
                   )
                 ),
-                new PopupMenuDivider(),
+                new PopupMenuDivider(), // ignore: list_element_type_not_assignable, https://github.com/flutter/flutter/issues/5771
                 new PopupMenuItem<String>(
                   value: 'Remove',
                   child: new ListItem(

examples/flutter_gallery/pubspec.yaml

 name: flutter_gallery
 dependencies:
-  intl: '>=0.12.4+2 <0.13.0'
+  intl: '>=0.12.4+2 <0.14.0'
   collection: '>=1.4.0 <2.0.0'
   string_scanner: ^1.0.0
 

examples/stocks/pubspec.yaml

@@ -2,7 +2,7 @@ name: stocks
 dependencies:
   flutter:
     path: ../../packages/flutter
-  intl: '>=0.12.4+2 <0.13.0'
+  intl: '>=0.12.4+2 <0.14.0'
 
 dev_dependencies:
   flutter_test:

packages/flutter/lib/src/services/image_resolution.dart

@@ -144,7 +144,7 @@ class AssetImage extends AssetBundleImageProvider {
     // TODO(ianh): JSON decoding really shouldn't be on the main thread.
     final Map<dynamic, dynamic> parsedManifest = JSON.decode(json);
     // TODO(ianh): convert that data structure to the right types.
-    return new SynchronousFuture<Map<dynamic, dynamic>>(parsedManifest);
+    return new SynchronousFuture<Map<dynamic, dynamic>>(parsedManifest); // ignore: return_of_invalid_type, https://github.com/flutter/flutter/issues/5771
   }
 
   String _chooseVariant(String main, ImageConfiguration config, List<String> candidates) {

packages/flutter/lib/src/widgets/gesture_detector.dart

@@ -223,7 +223,7 @@ class GestureDetector extends StatelessWidget {
     Map<Type, GestureRecognizerFactory> gestures = <Type, GestureRecognizerFactory>{};
 
     if (onTapDown != null || onTapUp != null || onTap != null || onTapCancel != null) {
-      gestures[TapGestureRecognizer] = (TapGestureRecognizer recognizer) {
+      gestures[TapGestureRecognizer] = (TapGestureRecognizer recognizer) { // ignore: invalid_assignment, https://github.com/flutter/flutter/issues/5771
         return (recognizer ??= new TapGestureRecognizer())
           ..onTapDown = onTapDown
           ..onTapUp = onTapUp
@@ -233,14 +233,14 @@ class GestureDetector extends StatelessWidget {
     }
 
     if (onDoubleTap != null) {
-      gestures[DoubleTapGestureRecognizer] = (DoubleTapGestureRecognizer recognizer) {
+      gestures[DoubleTapGestureRecognizer] = (DoubleTapGestureRecognizer recognizer) { // ignore: invalid_assignment, https://github.com/flutter/flutter/issues/5771
         return (recognizer ??= new DoubleTapGestureRecognizer())
           ..onDoubleTap = onDoubleTap;
       };
     }
 
     if (onLongPress != null) {
-      gestures[LongPressGestureRecognizer] = (LongPressGestureRecognizer recognizer) {
+      gestures[LongPressGestureRecognizer] = (LongPressGestureRecognizer recognizer) { // ignore: invalid_assignment, https://github.com/flutter/flutter/issues/5771
         return (recognizer ??= new LongPressGestureRecognizer())
           ..onLongPress = onLongPress;
       };
@@ -251,7 +251,7 @@ class GestureDetector extends StatelessWidget {
         onVerticalDragUpdate != null ||
         onVerticalDragEnd != null ||
         onVerticalDragCancel != null) {
-      gestures[VerticalDragGestureRecognizer] = (VerticalDragGestureRecognizer recognizer) {
+      gestures[VerticalDragGestureRecognizer] = (VerticalDragGestureRecognizer recognizer) { // ignore: invalid_assignment, https://github.com/flutter/flutter/issues/5771
         return (recognizer ??= new VerticalDragGestureRecognizer())
           ..onDown = onVerticalDragDown
           ..onStart = onVerticalDragStart
@@ -266,7 +266,7 @@ class GestureDetector extends StatelessWidget {
         onHorizontalDragUpdate != null ||
         onHorizontalDragEnd != null ||
         onHorizontalDragCancel != null) {
-      gestures[HorizontalDragGestureRecognizer] = (HorizontalDragGestureRecognizer recognizer) {
+      gestures[HorizontalDragGestureRecognizer] = (HorizontalDragGestureRecognizer recognizer) { // ignore: invalid_assignment, https://github.com/flutter/flutter/issues/5771
         return (recognizer ??= new HorizontalDragGestureRecognizer())
           ..onDown = onHorizontalDragDown
           ..onStart = onHorizontalDragStart
@@ -281,7 +281,7 @@ class GestureDetector extends StatelessWidget {
         onPanUpdate != null ||
         onPanEnd != null ||
         onPanCancel != null) {
-      gestures[PanGestureRecognizer] = (PanGestureRecognizer recognizer) {
+      gestures[PanGestureRecognizer] = (PanGestureRecognizer recognizer) { // ignore: invalid_assignment, https://github.com/flutter/flutter/issues/5771
         return (recognizer ??= new PanGestureRecognizer())
           ..onDown = onPanDown
           ..onStart = onPanStart
@@ -292,7 +292,7 @@ class GestureDetector extends StatelessWidget {
     }
 
     if (onScaleStart != null || onScaleUpdate != null || onScaleEnd != null) {
-      gestures[ScaleGestureRecognizer] = (ScaleGestureRecognizer recognizer) {
+      gestures[ScaleGestureRecognizer] = (ScaleGestureRecognizer recognizer) { // ignore: invalid_assignment, https://github.com/flutter/flutter/issues/5771
         return (recognizer ??= new ScaleGestureRecognizer())
           ..onStart = onScaleStart
           ..onUpdate = onScaleUpdate

packages/flutter/lib/src/widgets/scrollable.dart

@@ -695,7 +695,7 @@ class ScrollableState<T extends Scrollable> extends State<T> {
       switch (config.scrollDirection) {
         case Axis.vertical:
           return <Type, GestureRecognizerFactory>{
-            VerticalDragGestureRecognizer: (VerticalDragGestureRecognizer recognizer) {
+            VerticalDragGestureRecognizer: (VerticalDragGestureRecognizer recognizer) {  // ignore: map_value_type_not_assignable, https://github.com/flutter/flutter/issues/5771
               return (recognizer ??= new VerticalDragGestureRecognizer())
                 ..onDown = _handleDragDown
                 ..onStart = _handleDragStart
@@ -705,7 +705,7 @@ class ScrollableState<T extends Scrollable> extends State<T> {
           };
         case Axis.horizontal:
           return <Type, GestureRecognizerFactory>{
-            HorizontalDragGestureRecognizer: (HorizontalDragGestureRecognizer recognizer) {
+            HorizontalDragGestureRecognizer: (HorizontalDragGestureRecognizer recognizer) {  // ignore: map_value_type_not_assignable, https://github.com/flutter/flutter/issues/5771
               return (recognizer ??= new HorizontalDragGestureRecognizer())
                 ..onDown = _handleDragDown
                 ..onStart = _handleDragStart

packages/flutter/lib/src/widgets/unique_widget.dart

@@ -26,6 +26,6 @@ abstract class UniqueWidget<T extends State> extends StatefulWidget {
   /// Might be null if the widget is not currently in the tree.
   T get currentState {
     GlobalKey globalKey = key;
-    return globalKey.currentState;
+    return globalKey.currentState; // ignore: return_of_invalid_type, https://github.com/flutter/flutter/issues/5771
   }
 }

packages/flutter/pubspec.yaml

@@ -6,12 +6,12 @@ homepage: http://flutter.io
 
 dependencies:
   collection: '>=1.4.0 <2.0.0'
-  intl: '>=0.12.4+2 <0.13.0'
+  intl: '>=0.12.4+2 <0.14.0'
   vector_math: '>=2.0.3 <3.0.0'
 
   crypto: '>=1.1.1 <3.0.0'
 
-  meta: ^0.12.0
+  meta: ^1.0.2
 
   sky_engine:
     path: ../../bin/cache/pkg/sky_engine

packages/flutter_driver/lib/src/driver.dart

@@ -367,8 +367,8 @@ Future<VMServiceClientConnection> _waitAndConnect(String url) async {
       ws1 = await WebSocket.connect(uri.toString());
       ws2 = await WebSocket.connect(uri.toString());
       return new VMServiceClientConnection(
-        new VMServiceClient(new IOWebSocketChannel(ws1)),
-        new rpc.Peer(new IOWebSocketChannel(ws2))..listen()
+        new VMServiceClient(new IOWebSocketChannel(ws1).cast()),
+        new rpc.Peer(new IOWebSocketChannel(ws2).cast())..listen()
       );
     } catch(e) {
       if (ws1 != null)

packages/flutter_driver/lib/src/extension.dart

@@ -60,14 +60,14 @@ class FlutterDriverExtension {
 
   FlutterDriverExtension() {
     _commandHandlers.addAll(<String, CommandHandlerCallback>{
-      'get_health': getHealth,
-      'tap': tap,
-      'get_text': getText,
-      'scroll': scroll,
-      'scrollIntoView': scrollIntoView,
-      'setInputText': _setInputText,
-      'submitInputText': _submitInputText,
-      'waitFor': waitFor,
+      'get_health': getHealth, // ignore: map_value_type_not_assignable, #5771
+      'tap': tap, // ignore: map_value_type_not_assignable, #5771
+      'get_text': getText, // ignore: map_value_type_not_assignable, #5771
+      'scroll': scroll, // ignore: map_value_type_not_assignable, #5771
+      'scrollIntoView': scrollIntoView, // ignore: map_value_type_not_assignable, #5771
+      'setInputText': _setInputText, // ignore: map_value_type_not_assignable, #5771
+      'submitInputText': _submitInputText, // ignore: map_value_type_not_assignable, #5771
+      'waitFor': waitFor, // ignore: map_value_type_not_assignable, #5771
     });
 
     _commandDeserializers.addAll(<String, CommandDeserializerCallback>{

packages/flutter_driver/pubspec.yaml

@@ -20,6 +20,6 @@ dependencies:
     path: '../flutter_test'
 
 dev_dependencies:
-  test: 0.12.15+1
-  mockito: '^0.11.0'
-  quiver: '^0.21.4'
+  test: 0.12.15+4
+  mockito: ^1.0.0
+  quiver: ^0.21.4

packages/flutter_test/pubspec.yaml

@@ -5,12 +5,12 @@ dependencies:
   # The flutter tools depend on very specific internal implementation
   # details of the 'test' package, which change between versions, so
   # here we pin it precisely to avoid version skew across our packages.
-  test: 0.12.15+1
+  test: 0.12.15+4
 
   # We don't actually depend on 'analyzer', but 'test' and 'flutter_tools' do.
   # We pin the version of analyzer we depend on to avoid version skew across our
   # packages.
-  analyzer: 0.27.5-alpha.0 
+  analyzer: 0.28.2-alpha.0
 
   flutter:
     path: ../flutter

packages/flutter_tools/lib/src/dart/analysis.dart

@@ -15,7 +15,6 @@ import 'package:analyzer/src/dart/sdk/sdk.dart'; // ignore: implementation_impor
 import 'package:analyzer/src/generated/engine.dart'; // ignore: implementation_imports
 import 'package:analyzer/src/generated/error.dart'; // ignore: implementation_imports
 import 'package:analyzer/src/generated/java_io.dart'; // ignore: implementation_imports
-import 'package:analyzer/src/generated/sdk_io.dart'; // ignore: implementation_imports
 import 'package:analyzer/src/generated/source.dart'; // ignore: implementation_imports
 import 'package:analyzer/src/generated/source_io.dart'; // ignore: implementation_imports
 import 'package:analyzer/src/task/options.dart'; // ignore: implementation_imports
@@ -111,7 +110,8 @@ class AnalysisDriver {
       resolvers.add(new DartUriResolver(sdk));
     } else {
       // Fall back to a standard SDK if no embedder is found.
-      DirectoryBasedDartSdk sdk = new DirectoryBasedDartSdk(new JavaFile(sdkDir));
+      FolderBasedDartSdk sdk = new FolderBasedDartSdk(PhysicalResourceProvider.INSTANCE,
+          PhysicalResourceProvider.INSTANCE.getFolder(sdkDir));
       sdk.analysisOptions = context.analysisOptions;
 
       resolvers.add(new DartUriResolver(sdk));

packages/flutter_tools/lib/src/dart/pub.dart

@@ -48,7 +48,7 @@ Future<int> pubGet({
     String command = upgrade ? 'upgrade' : 'get';
     Status status = logger.startProgress("Running 'pub $command' in ${path.basename(directory)}...");
     int code = await runCommandAndStreamOutput(
-      <String>[sdkBinaryName('pub'), '--verbosity=warning', command, '--no-package-symlinks', '--no-precompile'],
+      <String>[sdkBinaryName('pub'), '--verbosity=warning', command, '--no-packages-dir', '--no-precompile'],
       workingDirectory: directory
     );
     status.stop(showElapsedTime: true);

packages/flutter_tools/lib/src/vmservice.dart

@@ -25,7 +25,7 @@ class VMService {
   static Future<VMService> connect(int port) async {
     Uri uri = new Uri(scheme: 'ws', host: '127.0.0.1', port: port, path: 'ws');
     WebSocket ws = await WebSocket.connect(uri.toString());
-    rpc.Peer peer = new rpc.Peer(new IOWebSocketChannel(ws));
+    rpc.Peer peer = new rpc.Peer(new IOWebSocketChannel(ws).cast());
     peer.listen();
     Uri httpAddress = new Uri(scheme: 'http', host: '127.0.0.1', port: port);
     return new VMService._(peer, port, httpAddress);

packages/flutter_tools/pubspec.yaml

@@ -22,7 +22,7 @@ dependencies:
   json_schema: 1.0.3
 
   linter: ^0.1.21
-  meta: ^0.12.0
+  meta: ^1.0.0
   mustache4dart: ^1.0.0
   package_config: '>=0.1.5 <2.0.0'
   path: ^1.3.0
@@ -36,13 +36,13 @@ dependencies:
   # We depend on very specific internal implementation details of the
   # 'test' package, which change between versions, so here we pin it
   # precisely.
-  test: 0.12.15+1
+  test: 0.12.15+4
 
   # Pinned in flutter_test as well.
-  analyzer: 0.27.5-alpha.0
+  analyzer: 0.28.2-alpha.0
 
 dev_dependencies:
-  mockito: ^0.11.0
+  mockito: ^1.0.0
 
 # Exclude this package from the hosted API docs.
 dartdoc: