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

content/renderer/render_view_impl.cc

 // 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.
 
 #include "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <memory>
 
@@ skipping 1029 matching lines @@
   // Force preload=none and disable autoplay on older Android
   // platforms because their media pipelines are not stable enough to handle
   // concurrent elements. See http://crbug.com/612909, http://crbug.com/622826.
   const bool is_jelly_bean =
       base::android::BuildInfo::GetInstance()->sdk_int() <=
       base::android::SDK_VERSION_JELLY_BEAN_MR2;
   settings->SetForcePreloadNoneForMediaElements(is_jelly_bean);
 
   WebRuntimeFeatures::EnableVideoFullscreenOrientationLock(
       prefs.video_fullscreen_orientation_lock_enabled);
+  WebRuntimeFeatures::EnableVideoRotateToFullscreen(
+      prefs.video_rotate_to_fullscreen_enabled);
   WebRuntimeFeatures::EnableVideoFullscreenDetection(
       prefs.video_fullscreen_detection_enabled);
   settings->SetEmbeddedMediaExperienceEnabled(
       prefs.embedded_media_experience_enabled);
   settings->SetDoNotUpdateSelectionOnMutatingSelectionRange(
       prefs.do_not_update_selection_on_mutating_selection_range);
 #else   // defined(OS_ANDROID)
   settings->SetCrossOriginMediaPlaybackRequiresUserGesture(
       prefs.cross_origin_media_playback_requires_user_gesture);
 #endif  // defined(OS_ANDROID)
@@ skipping 1612 matching lines @@
                             INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
   }
 
   std::unique_ptr<InputEventAck> ack(new InputEventAck(
       InputEventAckSource::MAIN_THREAD, input_event->GetType(),
       INPUT_EVENT_ACK_STATE_NOT_CONSUMED));
   OnInputEventAck(std::move(ack));
 }
 
 }  // namespace content