dart2js: move emitClass to emitter.

pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart

 // Copyright (c) 2014, 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 dart2js.js_emitter;
 
 
 class OldEmitter implements Emitter {
   final Compiler compiler;
   final CodeEmitterTask task;
@@ skipping 1757 matching lines @@
   CodeBuffer buildNativesBuffer(Program program) {
     // Emit native classes on [nativeBuffer].
     // TODO(johnniwinther): Avoid creating a [CodeBuffer].
     final CodeBuffer nativeBuffer = new CodeBuffer();
 
     if (program.nativeClasses.isEmpty) return nativeBuffer;
 
 
     addComment('Native classes', nativeBuffer);
 
-    nativeEmitter.generateNativeClasses(program.nativeClasses,
-                                        additionalProperties);
+    List<Class> neededClasses =
+        nativeEmitter.prepareNativeClasses(program.nativeClasses,
+                                           additionalProperties);
+
+    for (Class cls in neededClasses) {
+      assert(cls.isNative);
+      ClassBuilder enclosingBuilder = getElementDescriptor(cls.element);
+      emitClass(cls, enclosingBuilder);
+    }
 
     nativeEmitter.finishGenerateNativeClasses();
     nativeEmitter.assembleCode(nativeBuffer);
 
     return nativeBuffer;
   }
 
   int emitProgram(ProgramBuilder programBuilder) {
     Program program = programBuilder.buildProgram(
         storeFunctionTypesInMetadata: true);
@@ skipping 302 matching lines @@
     for (Element element in compiler.enqueuer.codegen.newlyEnqueuedElements) {
       if (element.isInstanceMember) {
         cachedClassBuilders.remove(element.enclosingClass);
 
         nativeEmitter.cachedBuilders.remove(element.enclosingClass);
 
       }
     }
   }
 }