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

pkg/compiler/lib/src/ssa/codegen.dart

Index: pkg/compiler/lib/src/ssa/codegen.dart
diff --git a/pkg/compiler/lib/src/ssa/codegen.dart b/pkg/compiler/lib/src/ssa/codegen.dart
index 0d4b38911d9bf6777dc1306ee7759f5b0aa1d29d..293e2075c014f7355f5017a60d834ec439dfac8d 100644
--- a/pkg/compiler/lib/src/ssa/codegen.dart
+++ b/pkg/compiler/lib/src/ssa/codegen.dart
@@ -1492,8 +1492,7 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
 
   void visitInterceptor(HInterceptor node) {
     registry.registerSpecializedGetInterceptor(node.interceptedClasses);
-    String name = backend.namer.getInterceptorName(
-        backend.getInterceptorMethod, node.interceptedClasses);
+    String name = backend.namer.getInterceptorName(node.interceptedClasses);
     var isolate = new js.VariableUse(
         backend.namer.globalObjectFor(backend.interceptorsLibrary));
     use(node.receiver);
@@ -1539,7 +1538,7 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
   void visitInvokeConstructorBody(HInvokeConstructorBody node) {
     use(node.inputs[0]);
     js.Expression object = pop();
-    String methodName = backend.namer.getNameOfInstanceMember(node.element);
+    String methodName = backend.namer.instanceMethodName(node.element);
     List<js.Expression> arguments = visitArguments(node.inputs);
     push(js.propertyCall(object, methodName, arguments), node);
     registry.registerStaticUse(node.element);
@@ -1679,7 +1678,7 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
           methodName = backend.namer.invocationName(selector);
         } else {
           assert(invariant(node, compiler.hasIncrementalSupport));
-          methodName = backend.namer.getNameOfInstanceMember(superMethod);
+          methodName = backend.namer.instanceMethodName(superMethod);
         }
         push(js.js('#.#.call(#)',
                    [backend.emitter.prototypeAccess(superClass,