gfx::Screen: Replace GetWindowUnderCursor() with IsWindowUnderCursor().

ui/gfx/screen.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_GFX_SCREEN_H_
 #define UI_GFX_SCREEN_H_
 
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 21 matching lines @@
   // Retrieves the single Screen object.
   static Screen* GetScreen();
 
   // Sets the global screen. NOTE: this does not take ownership of |screen|.
   // Tests must be sure to reset any state they install.
   static void SetScreenInstance(Screen* instance);
 
   // Returns the current absolute position of the mouse pointer.
   virtual gfx::Point GetCursorScreenPoint() = 0;
 
-  // Returns the window under the cursor.
-  virtual gfx::NativeWindow GetWindowUnderCursor() = 0;
+  // Returns true if the cursor is directly over |window|.
+  virtual bool IsWindowUnderCursor(gfx::NativeWindow window) = 0;
 
   // Returns the window at the given screen coordinate |point|.
   virtual gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) = 0;
 
   // Returns the number of displays.
   // Mirrored displays are excluded; this method is intended to return the
   // number of distinct, usable displays.
   virtual int GetNumDisplays() const = 0;
 
   // Returns the list of displays that are currently available.
@@ skipping 33 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Screen);
 };
 
 Screen* CreateNativeScreen();
 
 }  // namespace gfx
 
 #endif  // UI_GFX_SCREEN_H_