Add gesture target fuzzing to views

ui/views/view.h

Index: ui/views/view.h
diff --git a/ui/views/view.h b/ui/views/view.h
index d6af1bbed1cf65ccf62e393683c37a4068c1b55d..0f51514216c22bdabbb43a53499e8717dc65fe11 100644
--- a/ui/views/view.h
+++ b/ui/views/view.h
@@ -502,6 +502,14 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
   // Returns the deepest visible descendant that contains the specified point.
   virtual View* GetEventHandlerForPoint(const gfx::Point& point);
 
+  // Considers the bounding rectangles of all leaf descendant views that have
+  // at least views::kFuzzingOverlapPercentage of their area covered by
+  // |touch_rect|. Among these rectangles, choose one that is closest to the
+  // center line of |touch_rect| and return its corresponding View. If there
+  // are no such rectangles, NULL is returned. Note that |touch_rect| is in
+  // screen coordinates.
+  virtual View* GetEventHandlerForRect(const gfx::Rect& touch_rect);
+
   // Return the cursor that should be used for this view or the default cursor.
   // The event location is in the receiver's coordinate system. The caller is
   // responsible for managing the lifetime of the returned object, though that