Replace Backend with JavaScriptBackend.

pkg/compiler/lib/src/compiler.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart2js.compiler_base;
 
 import 'dart:async' show EventSink, Future;
 
 import '../compiler_new.dart' as api;
 import 'closure.dart' as closureMapping show ClosureTask;
-import 'common/backend_api.dart' show Backend;
 import 'common/names.dart' show Selectors;
 import 'common/names.dart' show Identifiers, Uris;
 import 'common/resolution.dart'
     show
         ParsingContext,
         Resolution,
         ResolutionWorkItem,
         ResolutionImpact,
         Target;
 import 'common/tasks.dart' show CompilerTask, GenericTask, Measurer;
@@ skipping 52 matching lines @@
 import 'types/types.dart' show GlobalTypeInferenceTask;
 import 'universe/selector.dart' show Selector;
 import 'universe/world_builder.dart'
     show ResolutionWorldBuilder, CodegenWorldBuilder;
 import 'universe/use.dart' show StaticUse, TypeUse;
 import 'universe/world_impact.dart'
     show ImpactStrategy, WorldImpact, WorldImpactBuilderImpl;
 import 'util/util.dart' show Link, Setlet;
 import 'world.dart' show ClosedWorld, ClosedWorldRefiner, ClosedWorldImpl;
 
-typedef Backend MakeBackendFunction(Compiler compiler);
+typedef js_backend.JavaScriptBackend MakeBackendFunction(Compiler compiler);

[Siggi Cherem (dart-lang), 2017/02/08 00:10:03]

we might want to add a todo to remove this, we should no longer need to create
custom backends :)

[Johnni Winther, 2017/02/08 09:46:35]

Done.

 
 typedef CompilerDiagnosticReporter MakeReporterFunction(
     Compiler compiler, CompilerOptions options);
 
 abstract class Compiler implements LibraryLoaderListener {
   Measurer get measurer;
 
   final IdGenerator idGenerator = new IdGenerator();
   Types types;
   _CompilerCommonElements _commonElements;
@@ skipping 61 matching lines @@
   ScannerTask scanner;
   DietParserTask dietParser;
   ParserTask parser;
   PatchParserTask patchParser;
   LibraryLoaderTask libraryLoader;
   SerializationTask serialization;
   ResolverTask resolver;
   closureMapping.ClosureTask closureToClassMapper;
   TypeCheckerTask checker;
   GlobalTypeInferenceTask globalInference;
-  Backend backend;
+  js_backend.JavaScriptBackend backend;
 
   GenericTask selfTask;
 
   /// The constant environment for the frontend interpretation of compile-time
   /// constants.
   ConstantEnvironment constants;
 
   EnqueueTask enqueuer;
   DeferredLoadTask deferredLoadTask;
   MirrorUsageAnalyzerTask mirrorUsageAnalyzerTask;
@@ skipping 87 matching lines @@
 
     _parsingContext =
         new ParsingContext(reporter, parser, scanner, patchParser, backend);
 
     tasks.addAll(backend.tasks);
   }
 
   /// Creates the backend.
   ///
   /// Override this to mock the backend for testing.
-  Backend createBackend() {
+  js_backend.JavaScriptBackend createBackend() {
     return new js_backend.JavaScriptBackend(this,
         generateSourceMap: options.generateSourceMap,
         useStartupEmitter: options.useStartupEmitter,
         useNewSourceInfo: options.useNewSourceInfo,
         useKernel: options.useKernel);
   }
 
   /// Creates the scanner task.
   ///
   /// Override this to mock the scanner for testing.
@@ skipping 1813 matching lines @@
     if (library != null && library.isSynthesized) {
       return null;
     }
     if (library == null && required) {
       throw new SpannableAssertionFailure(
           library, "The library '${uri}' was not found.");
     }
     return library;
   }
 }