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 529 matching lines @@
   bool isInterceptorClass(ClassElement element) {
     if (element == null) return false;
     if (Elements.isNativeOrExtendsNative(element)) return true;
     if (interceptedClasses.contains(element)) return true;
     if (classesMixedIntoInterceptedClasses.contains(element)) return true;
     return false;
   }
 
   String registerOneShotInterceptor(Selector selector) {
     Set<ClassElement> classes = getInterceptedClassesOn(selector.name);
-    String name = namer.getOneShotInterceptorName(selector, classes);
+    String name = namer.nameForGetOneShotInterceptor(selector, classes);
     if (!oneShotInterceptors.containsKey(name)) {
       registerSpecializedGetInterceptor(classes);
       oneShotInterceptors[name] = selector;
     }
     return name;
   }
 
   /**
    * Record that [method] is called from a subclass via `super`.
    */
@@ skipping 178 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.nameForGetInterceptor(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 1945 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);
 }