[Mac] Adjust omnibox decoration dragging to keep image under mouse.

chrome/browser/cocoa/location_bar/ev_bubble_decoration.h

 // Copyright (c) 2010 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 CHROME_BROWSER_COCOA_LOCATION_BAR_EV_BUBBLE_DECORATION_H_
 #define CHROME_BROWSER_COCOA_LOCATION_BAR_EV_BUBBLE_DECORATION_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "chrome/browser/cocoa/location_bar/bubble_decoration.h"
@@ skipping 10 matching lines @@
 class LocationIconDecoration;
 
 class EVBubbleDecoration : public BubbleDecoration {
  public:
   EVBubbleDecoration(LocationIconDecoration* location_icon, NSFont* font);
 
   // Implement |LocationBarDecoration|.
   virtual bool IsDraggable();
   virtual NSPasteboard* GetDragPasteboard();
   virtual NSImage* GetDragImage();
+  virtual NSRect GetDragImageFrame(NSRect frame) {
+    return GetImageRectInFrame(frame);
+  }
   virtual bool OnMousePressed(NSRect frame);
   virtual bool AcceptsMousePress() { return true; }
 
  private:
   LocationIconDecoration* location_icon_;  // weak, owned by location bar.
 
   DISALLOW_COPY_AND_ASSIGN(EVBubbleDecoration);
 };
 
 #endif  // CHROME_BROWSER_COCOA_LOCATION_BAR_EV_BUBBLE_DECORATION_H_