Separate the 'if' expression from its statement (#9177)

dev/devicelab/bin/run.dart

@@ -128,7 +128,8 @@ final ArgParser _argParser = new ArgParser()
   );
 
 bool _listsEqual(List<dynamic> a, List<dynamic> b) {
-  if (a.length != b.length) return false;
+  if (a.length != b.length)
+    return false;
 
   for (int i = 0; i < a.length; i++) {
     if (a[i] != b[i])

dev/devicelab/lib/framework/adb.dart

@@ -384,7 +384,8 @@ String get adbPath {
 
   final String adbPath = path.join(androidHome, 'platform-tools/adb');
 
-  if (!canRun(adbPath)) throw 'adb not found at: $adbPath';
+  if (!canRun(adbPath))
+    throw 'adb not found at: $adbPath';
 
   return path.absolute(adbPath);
 }

dev/devicelab/lib/framework/runner.dart

@@ -101,7 +101,8 @@ Future<VMIsolateRef> _connectToRunnerIsolate(int vmServicePort) async {
       final VM vm = await client.getVM();
       final VMIsolateRef isolate = vm.isolates.single;
       final String response = await isolate.invokeExtension('ext.cocoonRunnerReady');
-      if (response != 'ready') throw 'not ready yet';
+      if (response != 'ready')
+        throw 'not ready yet';
       return isolate;
     } catch (error) {
       const Duration connectionTimeout = const Duration(seconds: 2);

dev/devicelab/lib/framework/utils.dart

@@ -306,7 +306,8 @@ Directory get flutterDirectory => dir('../..').absolute;
 String requireEnvVar(String name) {
   final String value = Platform.environment[name];
 
-  if (value == null) fail('$name environment variable is missing. Quitting.');
+  if (value == null)
+    fail('$name environment variable is missing. Quitting.');
 
   return value;
 }
@@ -450,4 +451,4 @@ Future<int> findAvailablePort() async {
   }
 }
 
-bool canRun(String path) => _processManager.canRun(path);
+bool canRun(String path) => _processManager.canRun(path);
\ No newline at end of file

dev/devicelab/lib/tasks/perf_tests.dart

@@ -112,7 +112,8 @@ class StartupTest {
       ]).timeout(_startupTimeout);
       final Map<String, dynamic> data = JSON.decode(file('$testDirectory/build/start_up_info.json').readAsStringSync());
 
-      if (!reportMetrics) return new TaskResult.success(data);
+      if (!reportMetrics)
+        return new TaskResult.success(data);
 
       return new TaskResult.success(data, benchmarkScoreKeys: <String>[
         'timeToFirstFrameMicros',

examples/flutter_gallery/test/update_test.dart

@@ -12,7 +12,8 @@ Future<String> mockUpdateUrlFetcher() {
 
 void main() {
   final TestWidgetsFlutterBinding binding = TestWidgetsFlutterBinding.ensureInitialized();
-  if (binding is LiveTestWidgetsFlutterBinding) binding.allowAllFrames = true;
+  if (binding is LiveTestWidgetsFlutterBinding)
+    binding.allowAllFrames = true;
 
   // Regression test for https://github.com/flutter/flutter/pull/5168
   testWidgets('update dialog', (WidgetTester tester) async {

packages/flutter_driver/lib/src/driver.dart

@@ -537,7 +537,8 @@ Future<VMServiceClientConnection> _waitAndConnect(String url) async {
 
   Future<VMServiceClientConnection> attemptConnection() async {
     Uri uri = Uri.parse(url);
-    if (uri.scheme == 'http') uri = uri.replace(scheme: 'ws', path: '/ws');
+    if (uri.scheme == 'http')
+      uri = uri.replace(scheme: 'ws', path: '/ws');
 
     WebSocket ws1;
     WebSocket ws2;

packages/flutter_tools/lib/src/android/android_studio.dart

@@ -190,7 +190,8 @@ class AndroidStudio implements Comparable<AndroidStudio> {
 
     bool _hasStudioAt(String path, {Version newerThan}) {
       return studios.any((AndroidStudio studio) {
-        if (studio.directory != path) return false;
+        if (studio.directory != path)
+          return false;
         if (newerThan != null) {
           return studio.version.compareTo(newerThan) >= 0;
         }

packages/flutter_tools/lib/src/asset.dart

@@ -374,11 +374,13 @@ Map<_Asset, List<_Asset>> _parseAssets(
   if (manifestDescriptor.containsKey('fonts')) {
     for (Map<String, dynamic> family in manifestDescriptor['fonts']) {
       final List<Map<String, dynamic>> fonts = family['fonts'];
-      if (fonts == null) continue;
+      if (fonts == null)
+        continue;
 
       for (Map<String, dynamic> font in fonts) {
         final String asset = font['asset'];
-        if (asset == null) continue;
+        if (asset == null)
+          continue;
 
         final _Asset baseAsset = _resolveAsset(packageMap, assetBase, asset);
         if (!baseAsset.assetFileExists) {

packages/flutter_tools/lib/src/base/os.dart

@@ -207,7 +207,8 @@ String findProjectRoot([String directory]) {
     if (fs.isFileSync(fs.path.join(directory, kProjectRootSentinel)))
       return directory;
     final String parent = fs.path.dirname(directory);
-    if (directory == parent) return null;
+    if (directory == parent)
+      return null;
     directory = parent;
   }
 }

packages/flutter_tools/lib/src/base/version.dart

@@ -25,8 +25,10 @@ class Version implements Comparable<Version> {
   factory Version(int major, int minor, int patch, {String text}) {
     if (text == null) {
       text = major == null ? '0' : '$major';
-      if (minor != null) text = '$text.$minor';
-      if (patch != null) text = '$text.$patch';
+      if (minor != null)
+        text = '$text.$minor';
+      if (patch != null)
+        text = '$text.$patch';
     }
 
     return new Version._(major ?? 0, minor ?? 0, patch ?? 0, text);
@@ -93,8 +95,10 @@ class Version implements Comparable<Version> {
 
   @override
   int compareTo(Version other) {
-    if (major != other.major) return major.compareTo(other.major);
-    if (minor != other.minor) return minor.compareTo(other.minor);
+    if (major != other.major)
+      return major.compareTo(other.major);
+    if (minor != other.minor)
+      return minor.compareTo(other.minor);
     return patch.compareTo(other.patch);
   }
 

packages/flutter_tools/lib/src/commands/channel.dart

@@ -43,10 +43,13 @@ class ChannelCommand extends FlutterCommand {
       workingDirectory: Cache.flutterRoot,
       mapFunction: (String line) {
         final List<String> split = line.split('/');
-        if (split.length < 2) return null;
+        if (split.length < 2)
+          return null;
         final String branchName = split[1];
-        if (branchName.startsWith('HEAD')) return null;
-        if (branchName == currentBranch) return '* $branchName';
+        if (branchName.startsWith('HEAD'))
+          return null;
+        if (branchName == currentBranch)
+          return '* $branchName';
         return '  $branchName';
       },
     );

packages/flutter_tools/lib/src/doctor.dart

@@ -369,7 +369,8 @@ class IntelliJValidatorOnLinuxAndWindows extends IntelliJValidator {
 
   static Iterable<DoctorValidator> get installed {
     final List<DoctorValidator> validators = <DoctorValidator>[];
-    if (homeDirPath == null) return validators;
+    if (homeDirPath == null)
+      return validators;
 
     void addValidator(String title, String version, String installPath, String pluginsPath) {
       final IntelliJValidatorOnLinuxAndWindows validator =

packages/flutter_tools/test/create_test.dart

@@ -115,7 +115,8 @@ void main() {
       final CreateCommand command = new CreateCommand();
       final CommandRunner<Null> runner = createTestCommandRunner(command);
       final File existingFile = fs.file("${temp.path.toString()}/bad");
-      if (!existingFile.existsSync()) existingFile.createSync();
+      if (!existingFile.existsSync())
+        existingFile.createSync();
       try {
         await runner.run(<String>['create', existingFile.path]);
         fail('expected ToolExit exception');