Move namer into javascript backend.

lib/compiler/implementation/js_backend/native_emitter.dart

Index: lib/compiler/implementation/js_backend/native_emitter.dart
diff --git a/lib/compiler/implementation/js_backend/native_emitter.dart b/lib/compiler/implementation/js_backend/native_emitter.dart
index 8cd5c334bd0325ac0392609dfee93d1bcc9e0beb..f0631747826ee892827b97fbb7f87d6b3bee942c 100644
--- a/lib/compiler/implementation/js_backend/native_emitter.dart
+++ b/lib/compiler/implementation/js_backend/native_emitter.dart
@@ -48,6 +48,7 @@ class NativeEmitter {
         nativeBuffer = new CodeBuffer();
 
   Compiler get compiler => emitter.compiler;
+  JavaScriptBackend get backend => compiler.backend;
 
   void addRedirectingMethod(FunctionElement element, String name) {
     redirectingMethods[element] = name;
@@ -56,35 +57,35 @@ class NativeEmitter {
   String get dynamicName {
     Element element = compiler.findHelper(
         const SourceString('dynamicFunction'));
-    return compiler.namer.isolateAccess(element);
+    return backend.namer.isolateAccess(element);
   }
 
   String get dynamicSetMetadataName {
     Element element = compiler.findHelper(
         const SourceString('dynamicSetMetadata'));
-    return compiler.namer.isolateAccess(element);
+    return backend.namer.isolateAccess(element);
   }
 
   String get typeNameOfName {
     Element element = compiler.findHelper(
         const SourceString('getTypeNameOf'));
-    return compiler.namer.isolateAccess(element);
+    return backend.namer.isolateAccess(element);
   }
 
   String get defPropName {
     Element element = compiler.findHelper(
         const SourceString('defineProperty'));
-    return compiler.namer.isolateAccess(element);
+    return backend.namer.isolateAccess(element);
   }
 
   String get toStringHelperName {
     Element element = compiler.findHelper(
         const SourceString('toStringForNativeObject'));
-    return compiler.namer.isolateAccess(element);
+    return backend.namer.isolateAccess(element);
   }
 
   String get defineNativeClassName
-      => '${compiler.namer.CURRENT_ISOLATE}.\$defineNativeClass';
+      => '${backend.namer.CURRENT_ISOLATE}.\$defineNativeClass';
 
   String get defineNativeClassFunction {
     return """
@@ -102,7 +103,7 @@ function(cls, fields, methods) {
   void generateNativeLiteral(ClassElement classElement) {
     String quotedNative = classElement.nativeName.slowToString();
     String nativeCode = quotedNative.substring(2, quotedNative.length - 1);
-    String className = compiler.namer.getName(classElement);
+    String className = backend.namer.getName(classElement);
     nativeBuffer.add(className);
     nativeBuffer.add(' = ');
     nativeBuffer.add(nativeCode);
@@ -178,7 +179,7 @@ function(cls, fields, methods) {
     FunctionSignature parameters = member.computeSignature(compiler);
     Element converter =
         compiler.findHelper(const SourceString('convertDartClosureToJS'));
-    String closureConverter = compiler.namer.isolateAccess(converter);
+    String closureConverter = backend.namer.isolateAccess(converter);
     parameters.forEachParameter((Element parameter) {
       String name = parameter.name.slowToString();
       // If [name] is not in [argumentsBuffer], then the parameter is
@@ -223,7 +224,7 @@ function(cls, fields, methods) {
       // When calling a method that has a native body, we call it
       // with our calling conventions.
       String arguments = Strings.join(argumentsBuffer, ",");
-      code.add('  return this.${compiler.namer.getName(member)}($arguments)');
+      code.add('  return this.${backend.namer.getName(member)}($arguments)');
     } else {
       // When calling a JS method, we call it with the native name.
       String name = redirectingMethods[member];
@@ -385,7 +386,7 @@ function(cls, fields, methods) {
   void emitIsChecks(Map<String, String> objectProperties) {
     for (Element type in compiler.codegenWorld.isChecks) {
       if (!requiresNativeIsCheck(type)) continue;
-      String name = compiler.namer.operatorIs(type);
+      String name = backend.namer.operatorIs(type);
       objectProperties[name] = 'function() { return false; }';
     }
   }
@@ -406,7 +407,7 @@ function(cls, fields, methods) {
 
     // In order to have the toString method on every native class,
     // we must patch the JS Object prototype with a helper method.
-    String toStringName = compiler.namer.instanceMethodName(
+    String toStringName = backend.namer.instanceMethodName(
         null, const SourceString('toString'), 0);
     objectProperties[toStringName] =
         'function() { return $toStringHelperName(this); }';