Add icon to the panel titlebar on Mac.

chrome/browser/ui/panels/panel_titlebar_view_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_TITLEBAR_VIEW_COCOA_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_TITLEBAR_VIEW_COCOA_H_
 
 #import <Cocoa/Cocoa.h>
 
 #import "chrome/browser/ui/cocoa/tracking_area.h"
@@ skipping 17 matching lines @@
 // released. Use these simple states to track this condition.
 enum PanelDragState {
   PANEL_DRAG_CAN_START,  // Mouse key went down, drag may be started.
   PANEL_DRAG_IN_PROGRESS,
   PANEL_DRAG_SUPPRESSED  // Ignore drag events until PANEL_DRAG_CAN_START.
 };
 
 @interface PanelTitlebarViewCocoa : NSView {
  @private
   IBOutlet PanelWindowControllerCocoa* controller_;
+  IBOutlet NSImageView* icon_;
   IBOutlet NSTextField* title_;
   IBOutlet HoverImageButton* settingsButton_;
   NSButton* closeButton_;  // Created explicitly, not from NIB. Weak, destroyed
                            // when view is destroyed, as a subview.
   ScopedCrTrackingArea closeButtonTrackingArea_;
   PanelDragState dragState_;
 }
 
   // Callback from Close button.
 - (void)onCloseButtonClick:(id)sender;
 
   // Callback from Settings button.
 - (void)onSettingsButtonClick:(id)sender;
 
   // Attaches this view to the controller_'s window as a titlebar.
 - (void)attach;
 
 - (void)setTitle:(NSString*)newTitle;
+- (void)setIcon:(NSImage*)newIcon;
 
   // Should be called when size of the titlebar changes.
 - (void)updateCloseButtonLayout;
+- (void)updateIconAndTitleLayout;
 
 // We need to update our look when the Chrome theme changes or window focus
 // changes.
 - (void)didChangeTheme:(NSNotification*)notification;
 - (void)didChangeMainWindow:(NSNotification*)notification;
 
 // Helpers to control title drag operation, called from more then one place.
 // TODO(dimich): replace BOOL parameter that we have to explicitly specify at
 // callsites with an enum defined in PanelManager.
 - (void)startDrag;
@@ skipping 17 matching lines @@
 - (void)pressLeftMouseButtonTitlebar;
 - (void)releaseLeftMouseButtonTitlebar;
 - (void)dragTitlebarDeltaX:(double)delta_x
                     deltaY:(double)delta_y;
 - (void)cancelDragTitlebar;
 - (void)finishDragTitlebar;
 
 @end  // @interface PanelTitlebarViewCocoa(TestingAPI)
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_TITLEBAR_VIEW_COCOA_H_