dart2js: Merge intercepted names map.

sdk/lib/_internal/compiler/js_lib/interceptors.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 _interceptors;
 
 import 'dart:_js_embedded_names' show
     DISPATCH_PROPERTY_NAME;
 
 import 'dart:collection';
@@ skipping 157 matching lines @@
       return JS_INTERCEPTOR_CONSTANT(PlainJavaScriptObject);
     } else {
       return JS_INTERCEPTOR_CONSTANT(UnknownJavaScriptObject);
     }
   }
 
   return interceptor;
 }
 
 /**
- * If [JSInvocationMirror._invokeOn] is being used, this variable
- * contains a JavaScript array with the names of methods that are
- * intercepted.
- */
-var interceptedNames;
-
-
-/**
  * Data structure used to map a [Type] to the [Interceptor] and constructors for
  * that type.  It is JavaScript array of 3N entries of adjacent slots containing
  * a [Type], followed by an [Interceptor] class for the type, followed by a
  * JavaScript object map for the constructors.
  *
  * The value of this variable is set by the compiler and contains only types
  * that are user extensions of native classes where the type occurs as a
  * constant in the program.
  *
  * The compiler, in CustomElementsAnalysis, assumes that [mapTypeToInterceptor]
@@ skipping 207 matching lines @@
  * Interceptor for unclassified JavaScript objects, typically objects with a
  * non-trivial prototype chain.
  *
  * This class also serves as a fallback for unknown JavaScript exceptions.
  */
 class UnknownJavaScriptObject extends JavaScriptObject {
   const UnknownJavaScriptObject();
 
   String toString() => JS('String', 'String(#)', this);
 }