Modify hit test masks for tabs and tab close buttons

ui/views/view.h

Index: ui/views/view.h
diff --git a/ui/views/view.h b/ui/views/view.h
index d6158534bfde399184b68eb10278b4aba6af363e..7608d4c94e3836911ff747b29f269501626a595c 100644
--- a/ui/views/view.h
+++ b/ui/views/view.h
@@ -108,6 +108,16 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
  public:
   typedef std::vector<View*> 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), 2013/10/28 20:23:29]

let's not add this to views. Instead we should delegate more of this to the
client.

[tdanderson, 2013/10/29 17:30:01]

I moved this to ui/views/rect_based_targeting_utils.h for the time being, and
will be moving all of rect_based_targeting_utils to ui/events (so they are in
the ui:: namespace) in a follow up patch: crbug.com/305795

+    HIT_TEST_SOURCE_MOUSE,
+    HIT_TEST_SOURCE_TOUCH
+  };
+
   struct ViewHierarchyChangedDetails {
     ViewHierarchyChangedDetails()
         : is_add(false),
@@ -1126,7 +1136,7 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
 
   // Called by HitTestRect() to retrieve a mask for hit-testing against.
   // Subclasses override to provide custom shaped hit test regions.
-  virtual void GetHitTestMask(gfx::Path* mask) const;
+  virtual void GetHitTestMask(HitTestSource source, gfx::Path* mask) const;
 
   virtual DragInfo* GetDragInfo();