Extract content dependency from keyboard code

ui/keyboard/keyboard_util.h

 // Copyright (c) 2013 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 UI_KEYBOARD_KEYBOARD_UTIL_H_
 #define UI_KEYBOARD_KEYBOARD_UTIL_H_
 
 #include <string>
 
-#include "base/strings/string16.h"
 // TODO(beng): replace with forward decl once RootWindow is renamed.
 #include "ui/aura/window.h"
 #include "ui/keyboard/keyboard_export.h"
 
-struct GritResourceMap;
-
 namespace aura {
 class WindowTreeHost;
 }
 
 class GURL;
 
 namespace keyboard {
 
 // Enumeration of swipe directions.
 enum CursorMoveDirection {
@@ skipping 128 matching lines @@
 
 // Marks that the keyboard load has started. This is used to measure the time it
 // takes to fully load the keyboard. This should be called before
 // MarkKeyboardLoadFinished.
 KEYBOARD_EXPORT void MarkKeyboardLoadStarted();
 
 // Marks that the keyboard load has ended. This finishes measuring that the
 // keyboard is loaded.
 KEYBOARD_EXPORT void MarkKeyboardLoadFinished();
 
-// Get the list of keyboard resources. |size| is populated with the number of
-// resources in the returned array.
-KEYBOARD_EXPORT const GritResourceMap* GetKeyboardExtensionResources(
-    size_t* size);
-
 // Sets the override content url.
 // This is used by for input view for extension IMEs.
 KEYBOARD_EXPORT void SetOverrideContentUrl(const GURL& url);
 
 // Gets the override content url.
 KEYBOARD_EXPORT const GURL& GetOverrideContentUrl();
 
 // Logs the keyboard control event as a UMA stat.
 void LogKeyboardControlEvent(KeyboardControlEvent event);
 
 }  // namespace keyboard
 
 #endif  // UI_KEYBOARD_KEYBOARD_UTIL_H_