Bug 1434822 part 1: Disable COM ping functionality for our parent process instead of for external processes. r=aklotz

MozReview-Commit-ID: 2ayfzIxh8Lo

--HG--
extra : rebase_source : 59e0d9d4a15bd6b714600558bebda4e2add08201
extra : histedit_source : d068b57d9706d4b0cc3e32e7e575f441f3e23a9c

ipc/mscom/FastMarshaler.cpp

@@ -103,7 +103,7 @@ FastMarshaler::GetMarshalFlags(DWORD aDestContext, DWORD aMshlFlags)
     return aMshlFlags;
   }
 
-  if (!IsCallerExternalProcess()) {
+  if (IsCallerExternalProcess()) {
     return aMshlFlags;
   }