Fix HidService lifetime issues.

extensions/browser/api/extensions_api_client.cc

 // Copyright 2014 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 "extensions/browser/api/extensions_api_client.h"
 
 #include "base/logging.h"
 
 namespace extensions {
 class AppViewGuestDelegate;
@@ skipping 27 matching lines @@
     content::BrowserContext* browser_context,
     int guest_instance_id,
     const std::string& guest_extension_id) {
   return false;
 }
 
 AppViewGuestDelegate* ExtensionsAPIClient::CreateAppViewGuestDelegate() const {
   return NULL;
 }
 
-device::HidService* ExtensionsAPIClient::GetHidService() {
-  // This should never be called by clients which don't support the HID API.
-  NOTIMPLEMENTED();
-  return NULL;
-}
-
 WebViewGuestDelegate* ExtensionsAPIClient::CreateWebViewGuestDelegate(
     WebViewGuest* web_view_guest) const {
   return NULL;
 }
 
 WebViewPermissionHelperDelegate* ExtensionsAPIClient::
     CreateWebViewPermissionHelperDelegate(
         WebViewPermissionHelper* web_view_permission_helper) const {
   return NULL;
 }
 
 }  // namespace extensions