[Mac] Move event hooks from CrApplication to BrowserCrApplication.

chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_bar_controller.h"
 
 #include "base/mac/mac_util.h"
 #include "base/metrics/histogram.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_editor.h"
@@ skipping 901 matching lines @@
 
 // End of menubar observation code.
 
 // Begin (or end) watching for a click outside this window.  Unlike
 // normal NSWindows, bookmark folder "fake menu" windows do not become
 // key or main.  Thus, traditional notification (e.g. WillResignKey)
 // won't work.  Our strategy is to watch (at the app level) for a
 // "click outside" these windows to detect when they logically lose
 // focus.
 - (void)watchForExitEvent:(BOOL)watch {
-  CrApplication* app = static_cast<CrApplication*>([NSApplication
-                                                    sharedApplication]);
-  DCHECK([app isKindOfClass:[CrApplication class]]);
+  BrowserCrApplication* app = static_cast<BrowserCrApplication*>(
+      [BrowserCrApplication sharedApplication]);
   if (watch) {
     if (!watchingForExitEvent_) {
       [app addEventHook:self];
       [self startObservingMenubar];
     }
   } else {
     if (watchingForExitEvent_) {
       [app removeEventHook:self];
       [self stopObservingMenubar];
     }
@@ skipping 1845 matching lines @@
 // to minimize touching the object passed in (likely a mock).
 - (void)setButtonContextMenu:(id)menu {
   buttonContextMenu_ = menu;
 }
 
 - (void)setIgnoreAnimations:(BOOL)ignore {
   ignoreAnimations_ = ignore;
 }
 
 @end