| 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 a483746581162e48d8319c8a38b0ccd7ecb2835a..438f010decd0fc27dc9d25a9be69ccabf0f87d66 100644 | 
| --- a/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in | 
| +++ b/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in | 
| @@ -179,6 +179,7 @@ SlimmingPaintUnderInvalidationChecking | 
| StackedCSSPropertyAnimations status=experimental | 
| StyleSharing status=stable | 
| StyleMatchedPropertiesCache status=stable | 
| +SubscriptionRestrictions status=experimental | 
| // Do not turn this flag into stable, because many interfaces that should not | 
| // be shipped would be enabled. Instead, remove the flag from the shipping | 
| // interface. | 
|  |