Move CrTrackingArea from chrome/browser/ui/cocoa to ui/base/cocoa.

chrome/browser/ui/cocoa/panels/panel_window_controller_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_COCOA_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_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>
 
 #include "base/memory/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 #import "chrome/browser/ui/cocoa/chrome_browser_window.h"
 #import "chrome/browser/ui/cocoa/tab_contents/tab_contents_controller.h"
-#import "chrome/browser/ui/cocoa/tracking_area.h"
 #include "chrome/browser/ui/panels/panel.h"
 
 class PanelCocoa;
 @class PanelTitlebarViewCocoa;
 
 @interface PanelWindowCocoaImpl : ChromeBrowserWindow {
 }
 @end
 
 @interface PanelWindowControllerCocoa : NSWindowController
@@ skipping 107 matching lines @@
 
 // Turns on user-resizable corners/sides indications and enables live resize.
 - (void)enableResizeByMouse:(BOOL)enable;
 
 - (NSRect)frameRectForContentRect:(NSRect)contentRect;
 - (NSRect)contentRectForFrameRect:(NSRect)frameRect;
 
 @end  // @interface PanelWindowController
 
 #endif  // CHROME_BROWSER_UI_COCOA_PANELS_PANEL_WINDOW_CONTROLLER_COCOA_H_