Exceptions for Web Notifications and the Push API by default.

content/child/runtime_features.cc

Index: content/child/runtime_features.cc
diff --git a/content/child/runtime_features.cc b/content/child/runtime_features.cc
index d100e5beccb97bfc716167f23867feffbcfde0fe..98b437b34aec7c60ec96e72436a2f00abf763e10 100644
--- a/content/child/runtime_features.cc
+++ b/content/child/runtime_features.cc
@@ -48,8 +48,6 @@ static void SetRuntimeFeatureDefaultsForPlatform() {
 
   // Android does not have support for PagePopup
   WebRuntimeFeatures::enablePagePopup(false);
-  // Android does not yet support the Web Notification API. crbug.com/115320
-  WebRuntimeFeatures::enableNotifications(false);
   // Android does not yet support SharedWorker. crbug.com/154571
   WebRuntimeFeatures::enableSharedWorker(false);
   // Android does not yet support NavigatorContentUtils.
@@ -102,6 +100,13 @@ void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
   if (command_line.HasSwitch(switches::kDisableMediaSource))
     WebRuntimeFeatures::enableMediaSource(false);
 
+  if (command_line.HasSwitch(switches::kDisableNotifications)) {
+    WebRuntimeFeatures::enableNotifications(false);
+
+    // Chrome's Push Messaging implementation relies on Web Notifications.
+    WebRuntimeFeatures::enablePushMessaging(false);
+  }
+
   if (command_line.HasSwitch(switches::kDisableSharedWorkers))
     WebRuntimeFeatures::enableSharedWorker(false);