Support painting panels with chromium themes on GTK.

chrome/browser/ui/panels/panel_titlebar_view_cocoa.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 CHROME_BROWSER_UI_PANELS_PANEL_TITLEBAR_VIEW_COCOA_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_TITLEBAR_VIEW_COCOA_H_
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/mac/cocoa_protocols.h"
@@ skipping 108 matching lines @@
 - (void)drag:(NSPoint)mouseLocation;
 
 // Draw Attention methods - change appearance of titlebar to attract user.
 - (void)drawAttention;
 - (void)stopDrawingAttention;
 - (BOOL)isDrawingAttention;
 - (void)startGlintAnimation;
 - (void)restartGlintAnimation:(NSTimer*)timer;
 - (void)stopGlintAnimation;
 
-// Returns width of titlebar when shown in "icon only" mode.
-- (int)iconOnlyWidthInScreenCoordinates;
-
 @end  // @interface PanelTitlebarView
 
 // Methods which are either only for testing, or only public for testing.
 @interface PanelTitlebarViewCocoa(TestingAPI)
 
 - (PanelWindowControllerCocoa*)controller;
 
 - (NSTextField*)title;
 - (NSButton*)closeButton;
 - (NSButton*)minimizeButton;
 - (NSButton*)restoreButton;
 
 // Simulates click on a close button. Used to test panel closing.
 - (void)simulateCloseButtonClick;
 
 // NativePanelTesting support.
 // |mouseLocation| is in Cocoa's screen coordinates.
 - (void)pressLeftMouseButtonTitlebar:(NSPoint)mouseLocation
                            modifiers:(int)modifierFlags;
 - (void)releaseLeftMouseButtonTitlebar:(int)modifierFlags;
 - (void)dragTitlebar:(NSPoint)mouseLocation;
 - (void)cancelDragTitlebar;
 - (void)finishDragTitlebar;
 
 @end  // @interface PanelTitlebarViewCocoa(TestingAPI)
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_TITLEBAR_VIEW_COCOA_H_