Introduce ViewRoot to forward input/view events to native

ui/android/view_android.h

Index: ui/android/view_android.h
diff --git a/ui/android/view_android.h b/ui/android/view_android.h
index 607a1acc72ae4dad10cfc8216cd5d76831b33c6f..8a05c83927f44eb5ea140dacb14ee2c1fdd7c11d 100644
--- a/ui/android/view_android.h
+++ b/ui/android/view_android.h
@@ -18,6 +18,7 @@ class Layer;
 
 namespace ui {
 
+class ViewClient;
 class WindowAndroid;
 
 // A simple container for a UI layer.
@@ -54,11 +55,9 @@ class UI_ANDROID_EXPORT ViewAndroid {
     // Default copy/assign disabled by move constructor.
   };
 
-  // A ViewAndroid may have its own delegate or otherwise will
-  // use the next available parent's delegate.
-  ViewAndroid(const base::android::JavaRef<jobject>& delegate);
-
+  ViewAndroid(ViewClient* client);

[boliu, 2016/12/06 00:34:14]

explicit

[Jinsuk Kim, 2016/12/06 07:35:07]

Done.

   ViewAndroid();
+
   virtual ~ViewAndroid();
 
   // Returns the window at the root of this hierarchy, or |null|
@@ -80,10 +79,17 @@ class UI_ANDROID_EXPORT ViewAndroid {
   bool StartDragAndDrop(const base::android::JavaRef<jstring>& jtext,
                         const base::android::JavaRef<jobject>& jimage);
 
+  gfx::Size GetPhysicalBackingSize();
+
   ScopedAnchorView AcquireAnchorView();
   void SetAnchorRect(const base::android::JavaRef<jobject>& anchor,
                      const gfx::RectF& bounds);
 
+  // Internal implementation of ViewClient forwarding calls to the interface.
+  bool OnPhysicalBackingSizeChanged(int width, int height);
+
+  void UpdateLayerBounds();
+
  protected:
   ViewAndroid* parent_;
 
@@ -96,9 +102,17 @@ class UI_ANDROID_EXPORT ViewAndroid {
   const base::android::ScopedJavaLocalRef<jobject>
       GetViewAndroidDelegate() const;
 
+  int GetPhysicalBackingSizeWidthPix();
+  int GetPhysicalBackingSizeHeightPix();
+  void SetPhysicalBackingSize(int width, int height);
+
   std::list<ViewAndroid*> children_;
   scoped_refptr<cc::Layer> layer_;
   JavaObjectWeakGlobalRef delegate_;
+  ViewClient* client_;

[boliu, 2016/12/06 00:34:14]

ViewClient* const client_;, it should be const, right?

[Jinsuk Kim, 2016/12/06 07:35:07]

Yes. Done.

+
+  int physical_width_pix_;
+  int physical_height_pix_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewAndroid);
 };