Adjust the tests to handle a higher-DPI test harness. (#10056)

Requires https://github.com/flutter/engine/pull/3688

bin/internal/engine.version

-7dd359e165162515ae882f2b6cb36e28a2acb37b
+6fef702cfaf58913f67979f725adcabc9bc55a0c

examples/stocks/test/icon_color_test.dart

@@ -61,8 +61,8 @@ void main() {
     expect(find.text('Account Balance'), findsNothing);
 
     // drag the drawer out
-    final Offset left = new Offset(0.0, ui.window.physicalSize.height / 2.0);
-    final Offset right = new Offset(ui.window.physicalSize.width, left.dy);
+    final Offset left = new Offset(0.0, (ui.window.physicalSize / ui.window.devicePixelRatio).height / 2.0);
+    final Offset right = new Offset((ui.window.physicalSize / ui.window.devicePixelRatio).width, left.dy);
     final TestGesture gesture = await tester.startGesture(left);
     await tester.pump();
     await gesture.moveTo(right);

packages/flutter/test/foundation/service_extensions_test.dart

@@ -145,9 +145,9 @@ void main() {
         r'^'
         r'RenderView#[0-9]+\n'
         r'   debug mode enabled - [a-zA-Z]+\n'
-        r'   window size: Size\(800\.0, 600\.0\) \(in physical pixels\)\n'
-        r'   device pixel ratio: 1\.0 \(physical pixels per logical pixel\)\n'
-        r'   configuration: Size\(800\.0, 600\.0\) at 1\.0x \(in logical pixels\)\n'
+        r'   window size: Size\(2400\.0, 1800\.0\) \(in physical pixels\)\n'
+        r'   device pixel ratio: 3\.0 \(physical pixels per logical pixel\)\n'
+        r'   configuration: Size\(800\.0, 600\.0\) at 3\.0x \(in logical pixels\)\n'
         r'$'
       ),
     ]);
@@ -168,8 +168,8 @@ void main() {
         r'   creator: RenderView\n'
         r'   offset: Offset\(0\.0, 0\.0\)\n'
         r'   transform:\n'
-        r'     \[0] 1\.0,0\.0,0\.0,0\.0\n'
-        r'     \[1] 0\.0,1\.0,0\.0,0\.0\n'
+        r'     \[0] 3\.0,0\.0,0\.0,0\.0\n'
+        r'     \[1] 0\.0,3\.0,0\.0,0\.0\n'
         r'     \[2] 0\.0,0\.0,1\.0,0\.0\n'
         r'     \[3] 0\.0,0\.0,0\.0,1\.0\n'
         r'$'

packages/flutter/test/gestures/gesture_binding_test.dart

@@ -68,17 +68,17 @@ void main() {
   });
 
   test('Synthetic move events', () {
-    final ui.PointerDataPacket packet = const ui.PointerDataPacket(
-      data: const <ui.PointerData>[
-        const ui.PointerData(
+    final ui.PointerDataPacket packet = new ui.PointerDataPacket(
+      data: <ui.PointerData>[
+        new ui.PointerData(
           change: ui.PointerChange.down,
-          physicalX: 1.0,
-          physicalY: 3.0,
+          physicalX: 1.0 * ui.window.devicePixelRatio,
+          physicalY: 3.0 * ui.window.devicePixelRatio,
         ),
-        const ui.PointerData(
+        new ui.PointerData(
           change: ui.PointerChange.up,
-          physicalX: 10.0,
-          physicalY: 15.0,
+          physicalX: 10.0 * ui.window.devicePixelRatio,
+          physicalY: 15.0 * ui.window.devicePixelRatio,
         ),
       ]
     );
@@ -154,10 +154,10 @@ void main() {
   });
 
   test('Synthetic hover and cancel for misplaced down and remove', () {
-    final ui.PointerDataPacket packet = const ui.PointerDataPacket(
-      data: const <ui.PointerData>[
-        const ui.PointerData(change: ui.PointerChange.add, device: 25, physicalX: 10.0, physicalY: 10.0),
-        const ui.PointerData(change: ui.PointerChange.down, device: 25, physicalX: 15.0, physicalY: 17.0),
+    final ui.PointerDataPacket packet = new ui.PointerDataPacket(
+      data: <ui.PointerData>[
+        new ui.PointerData(change: ui.PointerChange.add, device: 25, physicalX: 10.0 * ui.window.devicePixelRatio, physicalY: 10.0 * ui.window.devicePixelRatio),
+        new ui.PointerData(change: ui.PointerChange.down, device: 25, physicalX: 15.0 * ui.window.devicePixelRatio, physicalY: 17.0 * ui.window.devicePixelRatio),
         const ui.PointerData(change: ui.PointerChange.remove, device: 25),
       ]
     );
@@ -168,7 +168,7 @@ void main() {
     expect(events.length, 5);
     expect(events[0].runtimeType, equals(PointerAddedEvent));
     expect(events[1].runtimeType, equals(PointerHoverEvent));
-    expect(events[1].delta, equals(const Offset(5.0, 7.0) / ui.window.devicePixelRatio));
+    expect(events[1].delta, equals(const Offset(5.0, 7.0)));
     expect(events[2].runtimeType, equals(PointerDownEvent));
     expect(events[3].runtimeType, equals(PointerCancelEvent));
     expect(events[4].runtimeType, equals(PointerRemovedEvent));