Mac: Fix bookmark button drawing regression

ui/base/cocoa/nsview_additions.mm

 // 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.
 
 #include "base/mac/sdk_forward_declarations.h"
 #import "ui/base/cocoa/nsview_additions.h"
 #include "ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h"
 
 #include "base/logging.h"
 
@@ skipping 73 matching lines @@
   } else {
     [transform translateXBy:-NSMinX(frame) yBy:NSMaxY(frame)];
     [transform scaleXBy:1.0 yBy:-1.0];
   }
   [transform concat];
 
   // This can be made robust to recursive calls, but is as of yet unneeded.
   DCHECK(!g_ancestorBeingDrawnFrom && !g_childBeingDrawnTo);
   g_ancestorBeingDrawnFrom = ancestorView;
   g_childBeingDrawnTo = self;
-  [ancestorView drawRect:[self convertRect:dirtyRect toView:ancestorView]];
+  [ancestorView drawRect:NSIntersectionRect(
+                             [ancestorView bounds],
+                             [self convertRect:dirtyRect toView:ancestorView])];
   g_childBeingDrawnTo = nil;
   g_ancestorBeingDrawnFrom = nil;
 }
 
 - (NSView*)cr_viewBeingDrawnTo {
   if (!g_ancestorBeingDrawnFrom)
     return self;
   DCHECK(g_ancestorBeingDrawnFrom == self);
   return g_childBeingDrawnTo;
 }
 
 @end