Implement HasPermission() method in PermissionService.

content/public/browser/content_browser_client.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 CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 #define CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 
 #include <map>
 #include <string>
 #include <utility>
@@ skipping 434 matching lines @@
 
   virtual void CancelPermissionRequest(PermissionType permission,
                                        WebContents* web_contents,
                                        int bridge_id,
                                        const GURL& requesting_frame) {}
 
   virtual void RegisterPermissionUsage(PermissionType permission,
                                        WebContents* web_contents,
                                        const GURL& frame_url,
                                        const GURL& main_frame_url) {}
+  virtual void HasPermission(
+      PermissionType permission,
+      WebContents* web_contents,
+      const GURL& requesting_frame,
+      const base::Callback<void(bool)>& result_callback);
 
   // Returns true if the given page is allowed to open a window of the given
   // type. If true is returned, |no_javascript_access| will indicate whether
   // the window that is created should be scriptable/in the same process.
   // This is called on the IO thread.
   virtual bool CanCreateWindow(const GURL& opener_url,
                                const GURL& opener_top_level_frame_url,
                                const GURL& source_origin,
                                WindowContainerType container_type,
                                const GURL& target_url,
@@ skipping 158 matching lines @@
 // camera. Note that this does not query the user. |type| must be
 // MEDIA_DEVICE_AUDIO_CAPTURE or MEDIA_DEVICE_VIDEO_CAPTURE.
 virtual bool CheckMediaAccessPermission(BrowserContext* browser_context,
                                         const GURL& security_origin,
                                         MediaStreamType type);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_