Backed out changesets 1613eb430cec and 8ecfe45191b6 (bug 1066812) for B2G mochitest crashes.

dom/ipc/ContentChild.cpp

@@ -607,9 +607,6 @@ ContentChild::Init(MessageLoop* aIOLoop,
     // Make sure there's an nsAutoScriptBlocker on the stack when dispatching
     // urgent messages.
     GetIPCChannel()->BlockScripts();
-    // If communications with the parent have broken down, take the process
-    // down so it's not hanging around.
-    GetIPCChannel()->SetAbortOnError(true);
 
 #ifdef MOZ_X11
     // Send the parent our X socket to act as a proxy reference for our X

ipc/glue/MessageChannel.h

@@ -88,7 +88,7 @@ class MessageChannel : HasResultCodes
 
     void SetAbortOnError(bool abort)
     {
-        mAbortOnError = abort;
+        mAbortOnError = true;
     }
 
     // Misc. behavioral traits consumers can request for this channel