Add gesture target fuzzing to views

ui/views/view.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_VIEWS_VIEW_H_
 #define UI_VIEWS_VIEW_H_
 
 #include <algorithm>
 #include <map>
 #include <set>
@@ skipping 999 matching lines @@
   // view), then reorders the immediate children of that layer to match the
   // order of the view tree.
   virtual void ReorderLayers();
 
   // This reorders the immediate children of |*parent_layer| to match the
   // order of the view tree.
   virtual void ReorderChildLayers(ui::Layer* parent_layer);
 
   // Input ---------------------------------------------------------------------
 
+  // Considers all descendant views for which |touchRect| covers at least
+  // views::kFuzzingOverlapPercentage of the area of the view's bounding
+  // rectangle. Among these candidates, |closestOverlappedRect| is set to
+  // be the bounding rectangle that is closest to the center of |touchRect|
+  // using a distance-to-center-line metric. |closestOverlappedRect| remains
+  // empty if there are no such candidates.

[sadrul, 2012/07/16 22:16:14]

I can't say I understand this comment very well ... perhaps could use some
rewording.

[tdanderson, 2012/07/17 19:07:07]

Done.

+  virtual void FindClosestOverlappedRect(const gfx::Rect& touchRect,

[sadrul, 2012/07/16 22:16:14]

touch_rect etc. (chrome doesn't use camelCase).

You want closest_overlapped_rect to either be a Rect* or return gfx::Rect from
the function. Chrome doesn't use non-const reference.

[tdanderson, 2012/07/17 19:07:07]

Done.

+                                         gfx::Rect& closestOverlappedRect);
+
   // Called by HitTest to see if this View has a custom hit test mask. If the
   // return value is true, GetHitTestMask will be called to obtain the mask.
   // Default value is false, in which case the View will hit-test against its
   // bounds.
   virtual bool HasHitTestMask() const;
 
   // Called by HitTest to retrieve a mask for hit-testing against. Subclasses
   // override to provide custom shaped hit test regions.
   virtual void GetHitTestMask(gfx::Path* mask) const;
 
@@ skipping 437 matching lines @@
   base::win::ScopedComPtr<NativeViewAccessibilityWin>
       native_view_accessibility_win_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(View);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_VIEW_H_