Implement basic theming for panel titlebars.

chrome/browser/ui/panels/panel_window_controller_cocoa.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_
 
 // A class acting as the Objective-C controller for the Panel window
 // object. Handles interactions between Cocoa and the cross-platform
 // code. Each window has a single titlebar and is managed/owned by Panel.
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/mac/cocoa_protocols.h"
+#include "base/memory/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
+#import "chrome/browser/ui/cocoa/themed_window.h"
 
 @class FindBarCocoaController;
 class PanelBrowserWindowCocoa;
 @class PanelTitlebarViewCocoa;
 
 @interface PanelWindowControllerCocoa : NSWindowController<NSWindowDelegate> {
  @private
   IBOutlet PanelTitlebarViewCocoa* titlebar_view_;
   scoped_ptr<PanelBrowserWindowCocoa> windowShim_;
+  scoped_nsobject<NSString> pendingWindowTitle_;
 }
 
 // Load the browser window nib and do any Cocoa-specific initialization.
 - (id)initWithBrowserWindow:(PanelBrowserWindowCocoa*)window;
 
+- (ui::ThemeProvider*)themeProvider;
+- (ThemedWindowStyle)themedWindowStyle;
+- (NSPoint)themePatternPhase;
+
 // Returns the TabContents' native view. It renders the content of the web page
 // in the Panel.
 - (NSView*)tabContentsView;
 
 // Sometimes (when we animate the size of the window) we want to stop resizing
 // the TabContents's cocoa view to avoid unnecessary churn and issues
 // that can be caused by sizes near 0.
 - (void)disableTabContentsViewAutosizing;
 - (void)enableTabContentsViewAutosizing;
 
 // Shows the window for the first time. Only happens once.
 - (void)revealAnimatedWithFrame:(const NSRect&)frame;
 
+- (void)updateTitleBar;
+
 // Adds the FindBar controller's view to this Panel. Must only be
 // called once per PanelWindowControllerCocoa.
 - (void)addFindBar:(FindBarCocoaController*)findBarCocoaController;
 
 // Initiate the closing of the panel, starting from the platform-independent
 // layer. This will take care of PanelManager, other panels and close the
 // native window at the end.
 - (void)closePanel;
 
 // Accessor for titlebar view.
 - (PanelTitlebarViewCocoa*)titlebarView;
 
 @end  // @interface PanelWindowController
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_