[Mac] Move event hooks from CrApplication to BrowserCrApplication.

content/common/chrome_application_mac.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 "content/common/chrome_application_mac.h"
 
 #include "base/logging.h"
 
 @interface CrApplication ()
 - (void)setHandlingSendEvent:(BOOL)handlingSendEvent;
 @end
 
 @implementation CrApplication
 // Initialize NSApplication using the custom subclass.  Check whether NSApp
 // was already initialized using another class, because that would break
 // some things.
 + (NSApplication*)sharedApplication {
   NSApplication* app = [super sharedApplication];
   if (![NSApp isKindOfClass:self]) {
     DLOG(ERROR) << "NSApp should be of type " << [[self className] UTF8String]
                 << ", not " << [[NSApp className] UTF8String];
     DCHECK(false) << "NSApp is of wrong type";
   }
   return app;
 }
 
-- (id)init {
-  if ((self = [super init])) {
-    eventHooks_.reset([[NSMutableArray alloc] init]);
-  }
-  return self;
-}
-
 - (BOOL)isHandlingSendEvent {
   return handlingSendEvent_;
 }
 
 - (void)setHandlingSendEvent:(BOOL)handlingSendEvent {
   handlingSendEvent_ = handlingSendEvent;
 }
 
 - (void)clearIsHandlingSendEvent {
   [self setHandlingSendEvent:NO];
 }
 
 - (void)sendEvent:(NSEvent*)event {
   content::mac::ScopedSendingEvent sendingEventScoper;
-  for (id<CrApplicationEventHookProtocol> handler in eventHooks_.get()) {
-    [handler hookForEvent:event];
-  }
   [super sendEvent:event];
 }
 
-- (void)addEventHook:(id<CrApplicationEventHookProtocol>)handler {
-  [eventHooks_ addObject:handler];
-}
-
-- (void)removeEventHook:(id<CrApplicationEventHookProtocol>)handler {
-  [eventHooks_ removeObject:handler];
-}
-
 @end
 
 namespace chrome_application_mac {
 
 void RegisterCrApp() {
   [CrApplication sharedApplication];
 }
 
 }  // namespace chrome_application_mac