[PPAPI] Added PP_VARTYPE_RESOURCE as a PP_VarType enum value.

content/renderer/pepper/message_channel.cc

Index: content/renderer/pepper/message_channel.cc
diff --git a/content/renderer/pepper/message_channel.cc b/content/renderer/pepper/message_channel.cc
index 14cb9738d05a393c6c1a308c4213697b6556fcd5..f06b787e79587f679349f95a3998c6e55e3af7ba 100644
--- a/content/renderer/pepper/message_channel.cc
+++ b/content/renderer/pepper/message_channel.cc
@@ -104,7 +104,8 @@ PP_Var CopyPPVar(const PP_Var& var) {
     case PP_VARTYPE_OBJECT:
     case PP_VARTYPE_ARRAY:
     case PP_VARTYPE_DICTIONARY:
-      // Objects/Arrays/Dictionaries not supported by PostMessage in-process.
+    case PP_VARTYPE_RESOURCE:
+      // These types are not supported by PostMessage in-process.
       NOTREACHED();
       return PP_MakeUndefined();
   }