| Index: third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in | 
| diff --git a/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in b/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in | 
| index 7efe2b45dc2ac8404aca938701e40ec4a65de0ba..ec2cf628854948480ee5c9f9fa7ef200274c58fa 100644 | 
| --- a/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in | 
| +++ b/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in | 
| @@ -253,6 +253,7 @@ WebVR origin_trial_feature_name=WebVR | 
| WebVTTRegions status=experimental | 
| V8BasedStructuredClone status=stable | 
| V8IdleTasks | 
| +VideoFullscreenOrientationLock | 
| VisibilityChangeOnUnload status=stable | 
| XSLT status=stable | 
| smil status=stable | 
| @@ -270,4 +271,4 @@ LazyParseCSS status=experimental | 
| ParseHTMLOnMainThread status=test | 
| SendBeaconThrowForBlobWithNonSimpleType status=experimental | 
| PerformanceNavigationTiming2 status=test | 
| -BackgroundVideoTrackOptimization status=stable | 
| +BackgroundVideoTrackOptimization status=stable | 
|  |