Revert "ViewRoot class for event forwarding on Android"

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 e446048580dc6d63d456cff04791170fa19bfccc..68adf34d70eb8e6496ff37e547b165eb5bcc4d98 100644
--- a/ui/android/view_android.h
+++ b/ui/android/view_android.h
@@ -10,7 +10,6 @@
 #include "base/android/jni_weak_ref.h"
 #include "base/memory/ref_counted.h"
 #include "ui/android/ui_android_export.h"
-#include "ui/android/view_client.h"
 #include "ui/gfx/geometry/rect_f.h"
 
 namespace cc {
@@ -23,8 +22,6 @@ class WindowAndroid;
 
 // A simple container for a UI layer.
 // At the root of the hierarchy is a WindowAndroid, when attached.
-// TODO(jinsukkim): Replace WindowAndroid with ViewRoot for the root of the
-//     view hierarchy. See https://crbug.com/671401
 class UI_ANDROID_EXPORT ViewAndroid {
  public:
   // Stores an anchored view to delete itself at the end of its lifetime
@@ -57,7 +54,9 @@ class UI_ANDROID_EXPORT ViewAndroid {
     // Default copy/assign disabled by move constructor.
   };
 
-  explicit ViewAndroid(ViewClient* client);
+  // 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();
   virtual ~ViewAndroid();
@@ -76,29 +75,18 @@ class UI_ANDROID_EXPORT ViewAndroid {
   // if disconnected.
   virtual WindowAndroid* GetWindowAndroid() const;
 
-  // Returns |ViewRoot| of this hierarchy. |null| if the hierarchy isn't
-  // attached to a |ViewRoot|.
-  virtual ViewAndroid* GetViewRoot();
-
   // Used to return and set the layer for this view. May be |null|.
   cc::Layer* GetLayer() const;
   void SetLayer(scoped_refptr<cc::Layer> layer);
 
   void SetDelegate(const base::android::JavaRef<jobject>& delegate);
 
-  // Adds a child to this view.
+  // Adds this view as a child of another view.
   void AddChild(ViewAndroid* child);
 
-  // Move the give child ViewAndroid to the top of the list
-  // so that it can be the first responder of events.
-  void MoveToTop(ViewAndroid* child);
-
   // Detaches this view from its parent.
   void RemoveFromParent();
 
-  // Set the layout relative to parent. Used to do hit testing against events.
-  void SetLayout(int x, int y, int width, int height, bool match_parent);
-
   bool StartDragAndDrop(const base::android::JavaRef<jstring>& jtext,
                         const base::android::JavaRef<jobject>& jimage);
 
@@ -110,18 +98,9 @@ class UI_ANDROID_EXPORT ViewAndroid {
   base::android::ScopedJavaLocalRef<jobject> GetContainerView();
 
  protected:
-  // Internal implementation of ViewClient forwarding calls to the interface.
-  bool OnTouchEventInternal(const MotionEventData& event);
-
-  // Virtual for testing.
-  virtual float GetDipScale();
-
   ViewAndroid* parent_;
 
  private:
-  // Returns true only if this is of type |ViewRoot|.
-  bool IsViewRoot();
-
   void RemoveChild(ViewAndroid* child);
 
   // Returns the Java delegate for this view. This is used to delegate work
@@ -130,19 +109,10 @@ class UI_ANDROID_EXPORT ViewAndroid {
   const base::android::ScopedJavaLocalRef<jobject>
       GetViewAndroidDelegate() const;
 
-  // The child view at the back of the list receives event first.
   std::list<ViewAndroid*> children_;
   scoped_refptr<cc::Layer> layer_;
   JavaObjectWeakGlobalRef delegate_;
-  ViewClient* const client_;
-
-  // Basic view layout information. Used to do hit testing deciding whether
-  // the passed events should be processed by the view.
-  gfx::Point origin_;  // In parent's coordinate space.
-  gfx::Size size_;
-  bool match_parent_;  // Bounds matches that of the parent if true.
-
-  gfx::Vector2dF content_offset_;  // In CSS pixel.
+  gfx::Vector2dF content_offset_;  // in CSS pixel
 
   DISALLOW_COPY_AND_ASSIGN(ViewAndroid);
 };