Rename "register" -> "subscribe" in the Push Messaging code.

content/child/push_messaging/push_dispatcher.cc

Index: content/child/push_messaging/push_dispatcher.cc
diff --git a/content/child/push_messaging/push_dispatcher.cc b/content/child/push_messaging/push_dispatcher.cc
index 8cc33fc0dd20e53164d0fa60fbb94cd763af0b36..80d0bbc2d7f2cf1da13e70b1afa577599d5fec6b 100644
--- a/content/child/push_messaging/push_dispatcher.cc
+++ b/content/child/push_messaging/push_dispatcher.cc
@@ -27,14 +27,14 @@ bool PushDispatcher::ShouldHandleMessage(const IPC::Message& msg) const {
   // of the API functionality requires a direct association with a document and
   // a frame, and for those cases the IPC messages are handled by a
   // RenderFrameObserver.
-  return msg.type() == PushMessagingMsg_RegisterFromWorkerSuccess::ID ||
-         msg.type() == PushMessagingMsg_RegisterFromWorkerError::ID ||
-         msg.type() == PushMessagingMsg_GetRegistrationSuccess::ID ||
-         msg.type() == PushMessagingMsg_GetRegistrationError::ID ||
+  return msg.type() == PushMessagingMsg_SubscribeFromWorkerSuccess::ID ||
+         msg.type() == PushMessagingMsg_SubscribeFromWorkerError::ID ||
+         msg.type() == PushMessagingMsg_GetSubscriptionSuccess::ID ||
+         msg.type() == PushMessagingMsg_GetSubscriptionError::ID ||
          msg.type() == PushMessagingMsg_GetPermissionStatusSuccess::ID ||
          msg.type() == PushMessagingMsg_GetPermissionStatusError::ID ||
-         msg.type() == PushMessagingMsg_UnregisterSuccess::ID ||
-         msg.type() == PushMessagingMsg_UnregisterError::ID;
+         msg.type() == PushMessagingMsg_UnsubscribeSuccess::ID ||
+         msg.type() == PushMessagingMsg_UnsubscribeError::ID;
 }
 
 void PushDispatcher::OnFilteredMessageReceived(const IPC::Message& msg) {