touch: Return an enum from OnTouchEvent.

views/widget/root_view.h

Index: views/widget/root_view.h
diff --git a/views/widget/root_view.h b/views/widget/root_view.h
index bf47c42d7c883cbbf3be42d286ba14487c97c41b..dee51a402a677f131c6c935a1002ee1f986d33f9 100644
--- a/views/widget/root_view.h
+++ b/views/widget/root_view.h
@@ -39,6 +39,9 @@ class GestureManager;
 //
 /////////////////////////////////////////////////////////////////////////////
 class RootView : public View,
+#if defined(TOUCH_UI)
+                 public TouchEventObserver,
+#endif
                  public FocusTraversable {
  public:
   static const char kViewClassName[];
@@ -188,6 +191,11 @@ class RootView : public View,
   void SetGestureManager(GestureManager* g) { gesture_manager_ = g; }
 #endif
 
+#if defined(TOUCH_UI)
+  // Overridden from TouchEventObserver.
+  virtual void OnTouchSequenceEnd();
+#endif
+
  protected:
 
   // Overridden to properly reset our event propagation member