Adds the ability for WebContentsDelegate to decide if event should be updated

chrome/browser/ui/cocoa/browser_window_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_BROWSER_WINDOW_COCOA_H_
 #define CHROME_BROWSER_UI_COCOA_BROWSER_WINDOW_COCOA_H_
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/extensions/extension_keybinding_registry.h"
@@ skipping 117 matching lines @@
       Browser::DownloadClosePreventionType dialog_type,
       bool app_modal,
       const base::Callback<void(bool)>& callback) override;
   void UserChangedTheme() override;
   void ShowWebsiteSettings(
       Profile* profile,
       content::WebContents* web_contents,
       const GURL& virtual_url,
       const security_state::SecurityInfo& security_info) override;
   void ShowAppMenu() override;
-  bool PreHandleKeyboardEvent(const content::NativeWebKeyboardEvent& event,
-                              bool* is_keyboard_shortcut) override;
+  content::KeyboardEventProcessingResult PreHandleKeyboardEvent(
+      const content::NativeWebKeyboardEvent& event) override;
   void HandleKeyboardEvent(
       const content::NativeWebKeyboardEvent& event) override;
   void CutCopyPaste(int command_id) override;
   WindowOpenDisposition GetDispositionForPopupBounds(
       const gfx::Rect& bounds) override;
   FindBar* CreateFindBar() override;
   web_modal::WebContentsModalDialogHost* GetWebContentsModalDialogHost()
       override;
   void ShowAvatarBubbleFromAvatarButton(
       AvatarBubbleMode mode,
@@ skipping 44 matching lines @@
   ui::WindowShowState initial_show_state_;
   NSInteger attention_request_id_;  // identifier from requestUserAttention
 
   // Preserves window alert state to show appropriate icon in the window title
   // which can be audio playing, muting or none (determined by alert state of
   // tabs.
   TabAlertState alert_state_;
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_BROWSER_WINDOW_COCOA_H_