Bug 1376795 - Print a message when quitting in response to a content crash; r=cyu

MozReview-Commit-ID: HluXiBtux23

--HG--
extra : rebase_source : 16c168c048ee14db93d4df66c6dfa761952c3577

browser/modules/ContentCrashHandlers.jsm

@@ -150,6 +150,8 @@ this.TabCrashHandler = {
         let shutdown = env.exists("MOZ_CRASHREPORTER_SHUTDOWN");
 
         if (shutdown) {
+          dump("A content process crashed and MOZ_CRASHREPORTER_SHUTDOWN is " +
+               "set, shutting down\n");
           Services.startup.quit(Ci.nsIAppStartup.eForceQuit);
         }