Fix accelerated plugins rendering in Panels on Mac.

chrome/browser/ui/cocoa/themed_browser_window.mm

-// Copyright (c) 2011 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.
-
-#import "chrome/browser/ui/cocoa/themed_browser_window.h"
-
-#include "base/logging.h"
-#import "chrome/browser/ui/cocoa/themed_window.h"
-#include "ui/base/theme_provider.h"
-
-@implementation ThemedBrowserWindow 
-
-- (ui::ThemeProvider*)themeProvider {
-  id delegate = [self delegate];
-  if (![delegate respondsToSelector:@selector(themeProvider)])
-    return NULL;
-  return [delegate themeProvider];
-}
-
-- (ThemedWindowStyle)themedWindowStyle {
-  id delegate = [self delegate];
-  if (![delegate respondsToSelector:@selector(themedWindowStyle)])
-    return THEMED_NORMAL;
-  return [delegate themedWindowStyle];
-}
-
-- (NSPoint)themePatternPhase {
-  id delegate = [self delegate];
-  if (![delegate respondsToSelector:@selector(themePatternPhase)])
-    return NSMakePoint(0, 0);
-  return [delegate themePatternPhase];
-}
-
-@end