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

third_party/WebKit/Source/web/WebRuntimeFeatures.cpp

Index: third_party/WebKit/Source/web/WebRuntimeFeatures.cpp
diff --git a/third_party/WebKit/Source/web/WebRuntimeFeatures.cpp b/third_party/WebKit/Source/web/WebRuntimeFeatures.cpp
index dd795437b3f869cc104a9880073bedc70cb7696e..019d99bbaab837b3a29aab25fe3e17085e4a50fd 100644
--- a/third_party/WebKit/Source/web/WebRuntimeFeatures.cpp
+++ b/third_party/WebKit/Source/web/WebRuntimeFeatures.cpp
@@ -388,6 +388,10 @@ void WebRuntimeFeatures::EnableVideoFullscreenOrientationLock(bool enable) {
   RuntimeEnabledFeatures::setVideoFullscreenOrientationLockEnabled(enable);
 }
 
+void WebRuntimeFeatures::EnableVideoRotateToFullscreen(bool enable) {
+  RuntimeEnabledFeatures::setVideoRotateToFullscreenEnabled(enable);
+}
+
 void WebRuntimeFeatures::EnableVideoFullscreenDetection(bool enable) {
   RuntimeEnabledFeatures::setVideoFullscreenDetectionEnabled(enable);
 }