Add ContextMenuSourceType to views::ContextMenuController::ShowContextMenuForView.

ui/views/view.h

Index: ui/views/view.h
diff --git a/ui/views/view.h b/ui/views/view.h
index 4b10f0cd829c42fb4f689524b8528bf63568dcb9..ac4ac508057d55ae8553a0ba2dbe75491f23e645 100644
--- a/ui/views/view.h
+++ b/ui/views/view.h
@@ -826,7 +826,8 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
   // to provide right-click menu display triggerd by the keyboard (i.e. for the
   // Chrome toolbar Back and Forward buttons). No source needs to be specified,
   // as it is always equal to the current View.
-  virtual void ShowContextMenu(const gfx::Point& p, bool is_mouse_gesture);
+  virtual void ShowContextMenu(const gfx::Point& p,
+                               ui::ContextMenuSourceType source_type);
 
   // On some platforms, we show context menu on mouse press instead of release.
   // This method returns true for those platforms.