mac: Remove now-unneeded includes of cocoa_protocols.h

content/shell/shell_javascript_dialog_mac.mm

 // 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.
 
 #include "content/shell/shell_javascript_dialog.h"
 
 #import <Cocoa/Cocoa.h>
 
-#import "base/mac/cocoa_protocols.h"
 #import "base/memory/scoped_nsobject.h"
 #include "base/sys_string_conversions.h"
 #include "content/shell/shell_javascript_dialog_creator.h"
 
 // Helper object that receives the notification that the dialog/sheet is
 // going away. Is responsible for cleaning itself up.
 @interface ShellJavaScriptDialogHelper : NSObject<NSAlertDelegate> {
  @private
   scoped_nsobject<NSAlert> alert_;
   NSTextField* textField_;  // WEAK; owned by alert_
@@ skipping 109 matching lines @@
 
 ShellJavaScriptDialog::~ShellJavaScriptDialog() {
   [helper_ release];
 }
 
 void ShellJavaScriptDialog::Cancel() {
   [helper_ cancel];
 }
 
 }  // namespace content