dart2js: Refactoring, documentation, and a few bugfixes in Namer class.

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.
 
 part of js_backend;
 
 const VERBOSE_OPTIMIZER_HINTS = false;
 
 const bool USE_CPS_IR = const bool.fromEnvironment("USE_CPS_IR");
 
@@ skipping 720 matching lines @@
     }
     enqueueClass(enqueuer, cls, registry);
   }
 
   Set<ClassElement> get interceptedClasses {
     assert(compiler.enqueuer.resolution.queueIsClosed);
     return _interceptedClasses;
   }
 
   void registerSpecializedGetInterceptor(Set<ClassElement> classes) {
-    String name = namer.getInterceptorName(getInterceptorMethod, classes);
+    String name = namer.getInterceptorName(classes);
     if (classes.contains(jsInterceptorClass)) {
       // We can't use a specialized [getInterceptorMethod], so we make
       // sure we emit the one with all checks.
       specializedGetInterceptors[name] = interceptedClasses;
     } else {
       specializedGetInterceptors[name] = classes;
     }
   }
 
   void registerCompileTimeConstant(ConstantValue constant, Registry registry) {
@@ skipping 1775 matching lines @@
   }
 }
 
 /// Records that [constant] is used by the element behind [registry].
 class Dependency {
   final ConstantValue constant;
   final Element annotatedElement;
 
   const Dependency(this.constant, this.annotatedElement);
 }