Remove `flutter run_mojo` (#6584)

This command is no longer needed. Also, remove some stray references to Mojo.

packages/flutter/lib/src/rendering/layer.dart

@@ -134,7 +134,7 @@ class PictureLayer extends Layer {
   }
 }
 
-/// (mojo-only) A layer that represents content from another process.
+/// (Fuchsia-only) A layer that represents content from another process.
 class ChildSceneLayer extends Layer {
   /// Creates a layer that displays content rendered by another process.
   ///

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

@@ -11,15 +11,7 @@ import 'asset_bundle.dart';
 import 'image_cache.dart';
 import 'platform_messages.dart';
 
-/// Ensures that the [MojoShell] singleton is created synchronously
-/// during binding initialization. This allows other binding classes
-/// to register services in the same call stack as the services are
-/// offered to the embedder, thus avoiding any potential race
-/// conditions. For example, without this, the embedder might have
-/// requested a service before the Dart VM has started running; if the
-/// [MojoShell] is then created in an earlier call stack than the
-/// server for that service is provided, then the request will be
-/// rejected as not matching any registered servers.
+/// Listens for platform messages and directs them to [PlatformMessages].
 ///
 /// The ServicesBinding also registers a [LicenseEntryCollector] that exposes
 /// the licenses found in the LICENSE file stored at the root of the asset

packages/flutter_tools/lib/executable.dart

@@ -29,7 +29,6 @@ import 'src/commands/setup.dart';
 import 'src/commands/packages.dart';
 import 'src/commands/precache.dart';
 import 'src/commands/run.dart';
-import 'src/commands/run_mojo.dart';
 import 'src/commands/screenshot.dart';
 import 'src/commands/skia.dart';
 import 'src/commands/stop.dart';
@@ -73,7 +72,6 @@ Future<Null> main(List<String> args) async {
     ..addCommand(new PackagesCommand())
     ..addCommand(new PrecacheCommand())
     ..addCommand(new RunCommand(verboseHelp: verboseHelp))
-    ..addCommand(new RunMojoCommand(hidden: !verboseHelp))
     ..addCommand(new ScreenshotCommand())
     ..addCommand(new SetupCommand(hidden: !verboseHelp))
     ..addCommand(new SkiaCommand())

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

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-import 'dart:async';
-import 'dart:io';
-
-import 'package:path/path.dart' as path;
-
-import '../base/process.dart';
-import '../build_info.dart';
-import '../cache.dart';
-import '../flx.dart' as flx;
-import '../globals.dart';
-import '../resident_runner.dart';
-import '../runner/flutter_command.dart';
-
-String get _defaultBundlePath => path.join(getBuildDirectory(), 'app.flx');
-
-class RunMojoCommand extends FlutterCommand {
-  RunMojoCommand({ this.hidden: false }) {
-    argParser.addFlag('android', negatable: false, help: 'Run on an Android device');
-    argParser.addFlag('checked', negatable: false, help: 'Run Flutter in checked mode');
-    argParser.addFlag('mojo-debug', negatable: false, help: 'Use Debug build of mojo');
-    argParser.addFlag('mojo-release', negatable: false, help: 'Use Release build of mojo (default)');
-
-    argParser.addOption('target',
-        defaultsTo: '',
-        abbr: 't',
-        help: 'Target app path or filename to start.');
-    argParser.addOption('app', help: 'Run this Flutter app instead of building the target.');
-    argParser.addOption('mojo-path', help: 'Path to directory containing mojo_shell and services.');
-    argParser.addOption('devtools-path', help: 'Path to mojo devtools\' mojo_run command.');
-  }
-
-  @override
-  final String name = 'run_mojo';
-
-  @override
-  final String description = 'Run a Flutter app in mojo (from github.com/domokit/mojo).';
-
-  @override
-  final bool hidden;
-
-  // TODO(abarth): Why not use path.absolute?
-  String _makePathAbsolute(String relativePath) {
-    File file = new File(relativePath);
-    if (!file.existsSync()) {
-      throw new Exception('Path "$relativePath" does not exist');
-    }
-    return file.absolute.path;
-  }
-
-  bool _useDevtools() {
-    if (argResults['android'] || argResults['devtools-path'] != null) {
-      return true;
-    }
-    return false;
-  }
-
-  String _getDevtoolsPath() {
-    if (argResults['devtools-path'] != null) {
-      return _makePathAbsolute(argResults['devtools-path']);
-    }
-    return _makePathAbsolute(path.join(argResults['mojo-path'], 'mojo', 'devtools', 'common', 'mojo_run'));
-  }
-
-  String _getMojoShellPath() {
-    final String mojoBuildType = argResults['mojo-debug']  ? 'Debug' : 'Release';
-    return _makePathAbsolute(path.join(argResults['mojo-path'], 'out', mojoBuildType, 'mojo_shell'));
-  }
-
-  Future<List<String>> _getShellConfig(String targetApp) async {
-    List<String> args = <String>[];
-
-    final bool useDevtools = _useDevtools();
-    final String command = useDevtools ? _getDevtoolsPath() : _getMojoShellPath();
-    args.add(command);
-
-    TargetPlatform targetPlatform = argResults['android'] ? TargetPlatform.android_arm : TargetPlatform.linux_x64;
-    String flutterPath = path.join(tools.getEngineArtifactsDirectory(targetPlatform, BuildMode.debug).path, 'flutter.mojo');
-
-    if (argResults['android'])
-      args.add('--android');
-
-    final Uri appUri = Uri.parse(targetApp);
-    if (appUri.scheme.isEmpty || appUri.scheme == 'file') {
-      final String appPath = _makePathAbsolute(targetApp);
-      if (argResults['android']) {
-        final String appName = path.basename(appPath);
-        final String appDir = path.dirname(appPath);
-        args.add('mojo:launcher http://app/$appName');
-        args.add('--map-origin=http://app/=$appDir');
-      } else {
-        args.add('mojo:launcher file://$appPath');
-      }
-    } else {
-      args.add('mojo:launcher $targetApp');
-    }
-
-    // Add url-mapping for mojo:flutter.
-    if (argResults['android']) {
-      final String flutterName = path.basename(flutterPath);
-      final String flutterDir = path.dirname(flutterPath);
-      args.add('--map-origin=http://flutter/=$flutterDir');
-      args.add('--url-mappings=mojo:flutter=http://flutter/$flutterName');
-    } else {
-      args.add('--url-mappings=mojo:flutter=file://$flutterPath');
-    }
-
-    if (useDevtools) {
-      final String buildFlag = argResults['mojo-debug'] ? '--debug' : '--release';
-      args.add(buildFlag);
-      if (logger.isVerbose)
-        args.add('--verbose');
-    }
-
-    if (argResults['checked'])
-      args.add('--args-for=mojo:flutter --enable-checked-mode');
-
-    args.addAll(argResults.rest);
-    printStatus('$args');
-    return args;
-  }
-
-  @override
-  Future<int> runCommand() async {
-    if ((argResults['mojo-path'] == null && argResults['devtools-path'] == null) || (argResults['mojo-path'] != null && argResults['devtools-path'] != null)) {
-      printError('Must specify either --mojo-path or --devtools-path.');
-      return 1;
-    }
-
-    if (argResults['mojo-debug'] && argResults['mojo-release']) {
-      printError('Cannot specify both --mojo-debug and --mojo-release');
-      return 1;
-    }
-
-    String targetApp = argResults['app'];
-    if (targetApp == null) {
-      targetApp = _defaultBundlePath;
-
-      String mainPath = findMainDartFile(argResults['target']);
-
-      int result = await flx.build(
-        mainPath: mainPath,
-        outputPath: targetApp
-      );
-      if (result != 0)
-        return result;
-    }
-
-    Cache.releaseLockEarly();
-
-    return await runCommandAndStreamOutput(await _getShellConfig(targetApp));
-  }
-}