Support permission_broker for chrome.hid devices.

chrome/browser/extensions/api/chrome_extensions_api_client.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_CHROME_EXTENSIONS_API_CLIENT_H_
 #define CHROME_BROWSER_EXTENSIONS_API_CHROME_EXTENSIONS_API_CLIENT_H_
 
 #include "base/compiler_specific.h"
 #include "extensions/browser/api/extensions_api_client.h"
 
@@ skipping 14 matching lines @@
       OVERRIDE;
   virtual bool AppViewInternalAttachFrame(
       content::BrowserContext* browser_context,
       const GURL& url,
       int guest_instance_id,
       const std::string& guest_extension_id) OVERRIDE;
   virtual bool AppViewInternalDenyRequest(
       content::BrowserContext* browser_context,
       int guest_instance_id,
       const std::string& guest_extension_id) OVERRIDE;
+  virtual device::HidService* GetHidService() OVERRIDE;
 
  private:
+  scoped_ptr<device::HidService> hid_service_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeExtensionsAPIClient);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_CHROME_EXTENSIONS_API_CLIENT_H_