Introduce ViewRoot forwarding input/view events to native

content/browser/renderer_host/render_widget_host_view_android.h

Index: content/browser/renderer_host/render_widget_host_view_android.h
diff --git a/content/browser/renderer_host/render_widget_host_view_android.h b/content/browser/renderer_host/render_widget_host_view_android.h
index 7ad5cf29eca71485c90c939646c48b6bc7d3d009..89d510e84023db195b6b31deb98c023deea7068e 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.h
+++ b/content/browser/renderer_host/render_widget_host_view_android.h
@@ -34,6 +34,7 @@
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/android/delegated_frame_host_android.h"
 #include "ui/android/view_android.h"
+#include "ui/android/view_client.h"
 #include "ui/android/window_android_observer.h"
 #include "ui/events/android/motion_event_android.h"
 #include "ui/events/gesture_detection/filtered_gesture_provider.h"
@@ -63,6 +64,7 @@ struct NativeWebKeyboardEvent;
 class CONTENT_EXPORT RenderWidgetHostViewAndroid
     : public RenderWidgetHostViewBase,
       public ui::GestureProviderClient,
+      public ui::ViewClient,
       public ui::WindowAndroidObserver,
       public DelegatedFrameEvictorClient,
       public StylusTextSelectorClient,
@@ -154,6 +156,10 @@ class CONTENT_EXPORT RenderWidgetHostViewAndroid
   void OnDidNavigateMainFrameToNewPage() override;
   void SetNeedsBeginFrames(bool needs_begin_frames) override;
 
+  // ui::ViewClient implementation.
+  bool OnTouchEvent(const ui::MotionEventAndroid& event,
+                    bool is_touch_handle_event);
+
   // ui::GestureProviderClient implementation.
   void OnGestureEvent(const ui::GestureEventData& gesture) override;
 
@@ -212,8 +218,8 @@ class CONTENT_EXPORT RenderWidgetHostViewAndroid
                                 const base::string16& html,
                                 const gfx::Rect rect);
 
-  bool OnTouchEvent(const ui::MotionEvent& event);
-  bool OnTouchHandleEvent(const ui::MotionEvent& event);
+  bool ProcessTouchEvent(const ui::MotionEvent& event);
+  bool ProcessTouchHandleEvent(const ui::MotionEvent& event);
   void ResetGestureDetection();
   void SetDoubleTapSupportEnabled(bool enabled);
   void SetMultiTouchZoomSupportEnabled(bool enabled);