Move registering of interceptors to the JsBackend.

lib/compiler/implementation/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.
 
 typedef void Recompile(Element element);
 
 class ReturnInfo {
   HType returnType;
   List<Element> compiledFunctions;
 
@@ skipping 643 matching lines @@
 
   /**
    * Documentation wanted -- johnniwinther
    *
    * Invariant: Elements must be declaration elements.
    */
   final List<Element> invalidateAfterCodegen;
   ArgumentTypesRegistry argumentTypes;
   FieldTypesRegistry fieldTypes;
 
+  final Interceptors interceptors;
+
   List<CompilerTask> get tasks {
     return <CompilerTask>[builder, optimizer, generator, emitter];
   }
 
   JavaScriptBackend(Compiler compiler, bool generateSourceMap)
       : namer = new Namer(compiler),
         returnInfo = new Map<Element, ReturnInfo>(),
         invalidateAfterCodegen = new List<Element>(),
+        interceptors = new Interceptors(compiler),
         super(compiler, constantSystem: JAVA_SCRIPT_CONSTANT_SYSTEM) {
     emitter = new CodeEmitterTask(compiler, namer, generateSourceMap);
     builder = new SsaBuilderTask(this);
     optimizer = new SsaOptimizerTask(this);
     generator = new SsaCodeGeneratorTask(this);
     argumentTypes = new ArgumentTypesRegistry(this);
     fieldTypes = new FieldTypesRegistry(this);
   }
 
   Element get cyclicThrowHelper {
     return compiler.findHelper(const SourceString("throwCyclicInit"));
   }
 
   JavaScriptItemCompilationContext createItemCompilationContext() {
     return new JavaScriptItemCompilationContext();
   }
 
+  Element getInterceptor(Selector selector) {
+    return interceptors.getStaticInterceptorBySelector(selector);
+  }
+
   void enqueueHelpers(Enqueuer world) {
     enqueueAllTopLevelFunctions(compiler.jsHelperLibrary, world);
 
     jsIndexingBehaviorInterface =
         compiler.findHelper(const SourceString('JavaScriptIndexingBehavior'));
     if (jsIndexingBehaviorInterface != null) {
       world.registerIsCheck(jsIndexingBehaviorInterface.computeType(compiler));
     }
 
     for (var helper in [const SourceString('Closure'),
@@ skipping 235 matching lines @@
     print("Inferred return types:");
     print("----------------------");
     dumpReturnTypes();
     print("");
     print("Inferred field types:");
     print("------------------------");
     fieldTypes.dump();
     print("");
   }
 }