Revert r276792 - "Hook PushMessagingMessageFilter up to GCMDriver"

chrome/browser/profiles/off_the_record_profile_impl.cc

Index: chrome/browser/profiles/off_the_record_profile_impl.cc
diff --git a/chrome/browser/profiles/off_the_record_profile_impl.cc b/chrome/browser/profiles/off_the_record_profile_impl.cc
index 0c349b8b9f72899d13f34762c093084643086ea3..3f5f445d232344234845afa5f7e7a7800e8c68a9 100644
--- a/chrome/browser/profiles/off_the_record_profile_impl.cc
+++ b/chrome/browser/profiles/off_the_record_profile_impl.cc
@@ -440,12 +440,6 @@ quota::SpecialStoragePolicy*
   return GetExtensionSpecialStoragePolicy();
 }
 
-content::PushMessagingService*
-OffTheRecordProfileImpl::GetPushMessagingService() {
-  // TODO(johnme): Support push messaging in incognito if possible.
-  return NULL;
-}
-
 bool OffTheRecordProfileImpl::IsSameProfile(Profile* profile) {
   return (profile == this) || (profile == profile_);
 }