Remove Compiler and JavaScriptBackend from program_builder and collector.

pkg/compiler/lib/src/js_backend/backend.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 js_backend.backend;
 
 import '../common.dart';
 import '../common/backend_api.dart'
     show ForeignResolver, NativeRegistry, ImpactTransformer;
 import '../common/codegen.dart' show CodegenImpact, CodegenWorkItem;
@@ skipping 1268 matching lines @@
           "@NoSideEffects() should always be combined with @NoInline.");
     }
   }
 
   MethodElement helperForBadMain() => commonElements.badMain;
 
   MethodElement helperForMissingMain() => commonElements.missingMain;
 
   MethodElement helperForMainArity() => commonElements.mainHasTooManyParameters;
 
-  /// Returns the filename for the output-unit named [name].
-  ///
-  /// The filename is of the form "<main output file>_<name>.part.js".
-  /// If [addExtension] is false, the ".part.js" suffix is left out.
-  String deferredPartFileName(String name, {bool addExtension: true}) {
-    assert(name != "");
-    String outPath = compiler.options.outputUri != null
-        ? compiler.options.outputUri.path
-        : "out";
-    String outName = outPath.substring(outPath.lastIndexOf('/') + 1);
-    String extension = addExtension ? ".part.js" : "";
-    return "${outName}_$name$extension";
-  }
-
   /// Enable deferred loading. Returns `true` if the backend supports deferred
   /// loading.
   bool enableDeferredLoadingIfSupported(Spannable node) => true;
 
   /// Enable compilation of code with compile time errors. Returns `true` if
   /// supported by the backend.
   bool enableCodegenWithErrorsIfSupported(Spannable node) => true;
 
   jsAst.Expression rewriteAsync(
       FunctionElement element, jsAst.Expression code) {
@@ skipping 180 matching lines @@
 
   bool canUseAliasedSuperMember(MemberEntity member, Selector selector) {
     return !selector.isGetter;
   }
 
   /// Returns `true` if [member] is called from a subclass via `super`.
   bool isAliasedSuperMember(MemberEntity member) {
     return _aliasedSuperMembers.contains(member);
   }
 }