[Media controls] Add rotate-to-fullscreen gesture behind flag

content/public/common/web_preferences.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 CONTENT_PUBLIC_COMMON_WEB_PREFERENCES_H_
 #define CONTENT_PUBLIC_COMMON_WEB_PREFERENCES_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 229 matching lines @@
   bool report_screen_size_in_physical_pixels_quirk;
   // Used by Android_WebView only to support legacy apps that inject script into
   // a top-level initial empty document and expect it to persist on navigation.
   bool resue_global_for_unowned_main_frame;
   ProgressBarCompletion progress_bar_completion;
   // Specifies default setting for spellcheck when the spellcheck attribute is
   // not explicitly specified.
   bool spellcheck_enabled_by_default;
   // If enabled, when a video goes fullscreen, the orientation should be locked.
   bool video_fullscreen_orientation_lock_enabled;
+  // If enabled, fullscreen should be entered/exited when the device is rotated
+  // to/from the orientation of the video.
+  bool video_rotate_to_fullscreen_enabled;
   // If enabled, video fullscreen detection will be enabled.
   bool video_fullscreen_detection_enabled;
   bool embedded_media_experience_enabled;
 #else  // defined(OS_ANDROID)
   bool cross_origin_media_playback_requires_user_gesture;
 #endif  // defined(OS_ANDROID)
 
   // Default (used if the page or UA doesn't override these) values for page
   // scale limits. These are set directly on the WebView so there's no analogue
   // in WebSettings.
@@ skipping 30 matching lines @@
   // chrome, except for the cases where it would require lots of extra work for
   // the embedder to use the same default value.
   WebPreferences();
   WebPreferences(const WebPreferences& other);
   ~WebPreferences();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_WEB_PREFERENCES_H_