Reintroduce plumbing for user gesture into permission system.

chrome/browser/media/media_stream_device_permission_context.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_MEDIA_STREAM_DEVICE_PERMISSION_CONTEXT_H_
 #define CHROME_BROWSER_MEDIA_MEDIA_STREAM_DEVICE_PERMISSION_CONTEXT_H_
 
 #include "base/macros.h"
 #include "chrome/browser/permissions/permission_context_base.h"
 #include "components/content_settings/core/common/content_settings_types.h"
 #include "content/public/browser/permission_type.h"
 
 // Common class which handles the mic and camera permissions.
 // MediaStreamMicPermissionContextFactory and
 // MediaStreamCameraPermissionContextFactory will instantiate this with
 // corresponding |permission_type|.
 class MediaStreamDevicePermissionContext : public PermissionContextBase {
  public:
   MediaStreamDevicePermissionContext(
       Profile* profile,
       const content::PermissionType permission_type,
       const ContentSettingsType content_settings_type);
   ~MediaStreamDevicePermissionContext() override;
 
   // PermissionContextBase:
   void RequestPermission(content::WebContents* web_contents,
                          const PermissionRequestID& id,
                          const GURL& requesting_frame,
+                         bool user_gesture,
                          const BrowserPermissionCallback& callback) override;
 
   // TODO(xhwang): GURL.GetOrigin() shouldn't be used as the origin. Need to
   // refactor to use url::Origin. crbug.com/527149 is filed for this.
   ContentSetting GetPermissionStatus(
       const GURL& requesting_origin,
       const GURL& embedding_origin) const override;
 
   void ResetPermission(const GURL& requesting_origin,
                        const GURL& embedding_origin) override;
 
   void CancelPermissionRequest(content::WebContents* web_contents,
                                const PermissionRequestID& id) override;
 
  private:
   // PermissionContextBase:
   bool IsRestrictedToSecureOrigins() const override;
 
   ContentSettingsType content_settings_type_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamDevicePermissionContext);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_MEDIA_STREAM_DEVICE_PERMISSION_CONTEXT_H_