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

content/browser/renderer_host/pepper/pepper_printing_host.cc

Index: content/browser/renderer_host/pepper/pepper_printing_host.cc
===================================================================
--- content/browser/renderer_host/pepper/pepper_printing_host.cc	(revision 270145)
+++ content/browser/renderer_host/pepper/pepper_printing_host.cc	(working copy)
@@ -27,10 +27,11 @@
 int32_t PepperPrintingHost::OnResourceMessageReceived(
     const IPC::Message& msg,
     ppapi::host::HostMessageContext* context) {
-  IPC_BEGIN_MESSAGE_MAP(PepperPrintingHost, msg)
-  PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(
-      PpapiHostMsg_Printing_GetDefaultPrintSettings, OnGetDefaultPrintSettings)
-  IPC_END_MESSAGE_MAP()
+  PPAPI_BEGIN_MESSAGE_MAP(PepperPrintingHost, msg)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(
+        PpapiHostMsg_Printing_GetDefaultPrintSettings,
+        OnGetDefaultPrintSettings)
+  PPAPI_END_MESSAGE_MAP()
   return PP_ERROR_FAILED;
 }