Bug 990353 - Flip off source discarding for XPCShell. r=fabrice

js/xpconnect/src/XPCShellImpl.cpp

@@ -1550,6 +1550,11 @@ XRE_XPCShellMain(int argc, char **argv, char **envp)
                 return 1;
             }
 
+            // Even if we're building in a configuration where source is
+            // discarded, there's no reason to do that on XPCShell, and doing so
+            // might break various automation scripts.
+            JS::CompartmentOptionsRef(glob).setDiscardSource(false);
+
             backstagePass->SetGlobalObject(glob);
 
             JSAutoCompartment ac(cx, glob);