Move media permission checking logic for ChromeOS login pages

chrome/browser/media/webrtc/media_permission.h

 // Copyright 2015 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_MEDIA_WEBRTC_MEDIA_PERMISSION_H_
 #define CHROME_BROWSER_MEDIA_WEBRTC_MEDIA_PERMISSION_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "components/content_settings/core/common/content_settings.h"
 #include "components/content_settings/core/common/content_settings_types.h"
 #include "content/public/common/media_stream_request.h"
 #include "url/gurl.h"
 
 class Profile;
 
+namespace content {
+class WebContents;
+}
+
 // Represents a permission for microphone/camera access.
 class MediaPermission {
  public:
   MediaPermission(ContentSettingsType content_type,
                   const GURL& requesting_origin,
                   const GURL& embedding_origin,
-                  Profile* profile);
+                  Profile* profile,
+                  content::WebContents* web_contents);
 
   // Returns the status of the permission. If the setting is
   // CONTENT_SETTING_BLOCK, |denial_reason| will output the reason for it being
   // blocked.
   ContentSetting GetPermissionStatus(
       content::MediaStreamRequestResult* denial_reason) const;
 
   // Returns the status of the permission as with GetPermissionStatus but also
   // checks that the specified |device_id| is an available device.
   ContentSetting GetPermissionStatusWithDeviceRequired(
       const std::string& device_id,
       content::MediaStreamRequestResult* denial_reason) const;
 
  private:
   bool HasAvailableDevices(const std::string& device_id) const;
 
   const ContentSettingsType content_type_;
   const GURL requesting_origin_;
   const GURL embedding_origin_;
   const std::string device_id_;
   Profile* const profile_;
+  content::WebContents* const web_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaPermission);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_WEBRTC_MEDIA_PERMISSION_H_