Add a feature flag for enabling subscription restrictions

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 ee3184d0b4d6c32e6effa46594efcb2fe07005f9..2f0ae4c2008ca23aff42474d813f57b2e8b64a8e 100644
--- a/third_party/WebKit/Source/web/WebRuntimeFeatures.cpp
+++ b/third_party/WebKit/Source/web/WebRuntimeFeatures.cpp
@@ -270,6 +270,11 @@ void WebRuntimeFeatures::enablePushMessaging(bool enable)
     RuntimeEnabledFeatures::setPushMessagingEnabled(enable);
 }
 
+void WebRuntimeFeatures::enablePushSubscriptionRestrictions(bool enable)
+{
+    RuntimeEnabledFeatures::setPushSubscriptionRestrictionsEnabled(enable);
+}
+
 void WebRuntimeFeatures::enableUnsafeES3APIs(bool enable)
 {
     RuntimeEnabledFeatures::setUnsafeES3APIsEnabled(enable);