Add PPAPI_BEGIN_MESSAGE_MAP and PPAPI_END_MESSAGE_MAP to be used when dispatching IPCs using PPAPI_…

content/renderer/pepper/pepper_media_stream_video_track_host.cc

Index: content/renderer/pepper/pepper_media_stream_video_track_host.cc
===================================================================
--- content/renderer/pepper/pepper_media_stream_video_track_host.cc	(revision 270145)
+++ content/renderer/pepper/pepper_media_stream_video_track_host.cc	(working copy)
@@ -466,10 +466,10 @@
 int32_t PepperMediaStreamVideoTrackHost::OnResourceMessageReceived(
     const IPC::Message& msg,
     HostMessageContext* context) {
-  IPC_BEGIN_MESSAGE_MAP(PepperMediaStreamVideoTrackHost, msg)
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL(
-      PpapiHostMsg_MediaStreamVideoTrack_Configure, OnHostMsgConfigure)
-  IPC_END_MESSAGE_MAP()
+  PPAPI_BEGIN_MESSAGE_MAP(PepperMediaStreamVideoTrackHost, msg)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(
+        PpapiHostMsg_MediaStreamVideoTrack_Configure, OnHostMsgConfigure)
+  PPAPI_END_MESSAGE_MAP()
   return PepperMediaStreamTrackHostBase::OnResourceMessageReceived(msg,
                                                                    context);
 }