Migrate the Android compositor to cc::Layer classes.

android_webview/native/aw_contents.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ANDROID_WEBVIEW_NATIVE_AW_CONTENTS_H_
 #define ANDROID_WEBVIEW_NATIVE_AW_CONTENTS_H_
 
 #include <jni.h>
 #include <string>
 
 #include "android_webview/browser/find_helper.h"
 #include "android_webview/public/browser/draw_gl.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/android/jni_helper.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/browser/android/compositor.h"
 #include "content/public/browser/javascript_dialogs.h"
 
 class TabContents;
 
+namespace cc {
+class Layer;
+}
+
 namespace content {
 class Compositor;
 class WebContents;
 }
 
 namespace android_webview {
 
 class AwContentsContainer;
 class AwRenderViewHostExt;
 class AwWebContentsDelegate;
@@ skipping 88 matching lines @@
   bool compositor_visible_;
 
   DISALLOW_COPY_AND_ASSIGN(AwContents);
 };
 
 bool RegisterAwContents(JNIEnv* env);
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_NATIVE_AW_CONTENTS_H_