Support painting panels with chromium themes on GTK.

chrome/browser/ui/panels/panel_titlebar_view_cocoa.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.
 
 #import "chrome/browser/ui/panels/panel_titlebar_view_cocoa.h"
 
 #include <Carbon/Carbon.h>  // kVK_Escape
 #import <Cocoa/Cocoa.h>
 
 #include "base/logging.h"
@@ skipping 628 matching lines @@
                               selector:@selector(restartGlintAnimation:)
                               userInfo:nil
                                repeats:NO] retain]);
     // Gradually reduce the frequency of repeating the animation,
     // calming it down if user decides not to act upon it.
     if (glintInterval_ < kFinalGlintRepeatIntervalSeconds)
       glintInterval_ *= kGlintRepeatIntervalIncreaseFactor;
   }
 }
 
-- (int)iconOnlyWidthInScreenCoordinates {
-  int width = kIconAndTextPadding * 2;
-  if (!icon_)
-    return width;
-
-  return width + NSWidth([self convertRect:[icon_ frame] toView:nil]);
-}
-
 // (Private/TestingAPI)
 - (PanelWindowControllerCocoa*)controller {
   return controller_;
 }
 
 - (NSTextField*)title {
   return title_;
 }
 
 - (void)simulateCloseButtonClick {
@@ skipping 38 matching lines @@
 - (NSButton*)minimizeButton {
   return minimizeButton_;
 }
 
 - (NSButton*)restoreButton {
   return restoreButton_;
 }
 
 @end