Modify hit test masks for tabs and tab close buttons

ui/views/rect_based_targeting_utils.h

 // Copyright 2013 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_RECT_BASED_TARGETING_UTILS_H_
 #define UI_RECT_BASED_TARGETING_UTILS_H_
 
 #include "ui/views/views_export.h"
 
 namespace gfx {
 class Point;
 class Rect;
 }
 
 namespace views {
 
+// Specifies the source of the region used in a hit test.
+// HIT_TEST_SOURCE_MOUSE indicates the hit test is being performed with a
+// single point and HIT_TEST_SOURCE_TOUCH indicates the hit test is being
+// performed with a rect larger than a single point. This value can be used,
+// for example, to add extra padding or change the shape of the hit test mask.
+enum HitTestSource {

[Ben Goodger (Google), 2013/11/04 20:14:04]

just go ahead and inline this into View now, as you had before. Now that
Sadrul's shared your plan for refactoring we can do this for time time being.
Please make sure to add a TODO that this is obsoleted by EventTargeter.

[tdanderson, 2013/11/04 20:36:07]

Done.

+  HIT_TEST_SOURCE_MOUSE,
+  HIT_TEST_SOURCE_TOUCH
+};
+
 // Returns true if |rect| is 1x1.
 VIEWS_EXPORT bool UsePointBasedTargeting(const gfx::Rect& rect);
 
 // Returns the percentage of |rect_1|'s area that is covered by |rect_2|.
 VIEWS_EXPORT float PercentCoveredBy(const gfx::Rect& rect_1,
                                     const gfx::Rect& rect_2);
 
 // Returns the square of the distance from |point| to the center line of
 // |rect|. The center line of a rectangle is obtained by repeatedly
 // stripping away 1px borders around the rectangle until a line remains.
 VIEWS_EXPORT int DistanceSquaredFromCenterLineToPoint(const gfx::Point& point,
                                                       const gfx::Rect& rect);
 
 }  // namespace views
 
 #endif  // UI_RECT_BASED_TARGETING_UTILS_H_