Introduce ViewRoot forwarding input/view events to native

chrome/browser/android/compositor/compositor_view.h

 // Copyright 2015 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 CHROME_BROWSER_ANDROID_COMPOSITOR_COMPOSITOR_VIEW_H_
 #define CHROME_BROWSER_ANDROID_COMPOSITOR_COMPOSITOR_VIEW_H_
 
 #include <jni.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "cc/layers/layer_collections.h"
 #include "cc/resources/ui_resource_client.h"
 #include "content/public/browser/android/compositor_client.h"
 #include "content/public/browser/browser_child_process_observer.h"
 #include "third_party/skia/include/core/SkColor.h"
 
 namespace cc {
 class Layer;
 class SolidColorLayer;
 }
 
 namespace content {
 class Compositor;
 }
 
 namespace ui {
-class WindowAndroid;
 class ResourceManager;
 class UIResourceProvider;
+class ViewRoot;
 }
 
 namespace android {
 
 class SceneLayer;
 class TabContentManager;
 
 class CompositorView : public content::CompositorClient,
                        public content::BrowserChildProcessObserver {
  public:
   CompositorView(JNIEnv* env,
                  jobject obj,
                  jboolean low_mem_device,
-                 ui::WindowAndroid* window_android,
+                 ui::ViewRoot* view_root,
                  TabContentManager* tab_content_manager);
 
   void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& object);
 
   ui::ResourceManager* GetResourceManager();
   base::android::ScopedJavaLocalRef<jobject> GetResourceManager(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& jobj);
   void SetNeedsComposite(JNIEnv* env,
                          const base::android::JavaParamRef<jobject>& object);
@@ skipping 51 matching lines @@
   base::WeakPtrFactory<CompositorView> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorView);
 };
 
 bool RegisterCompositorView(JNIEnv* env);
 
 }  // namespace android
 
 #endif  // CHROME_BROWSER_ANDROID_COMPOSITOR_COMPOSITOR_VIEW_H_