Bug 129503, "IsCapabilityEnabled should return PR_TRUE if no script on stack"

sr=brendan, r=mstoltz, a=asa
If the js stack has no principals on it, return PR_TRUE from IsCapabilityEnabled
.  Currently, the only time we'd have a stack devoid of principals is when all f
unctions are native.  If this assumption changes, this may need to be revisited
(depending on what it would mean to be a compiled script without a principal.)


git-svn-id: svn://10.0.0.236/trunk@116124 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/caps/src/nsScriptSecurityManager.cpp

@@ -1668,6 +1668,12 @@ nsScriptSecurityManager::IsCapabilityEnabled(const char *capability,
         if (*result)
             return NS_OK;
     } while ((fp = JS_FrameIterator(cx, &fp)) != nsnull);
+
+    if (!previousPrincipal)
+    {
+        // No principals on the stack, all native code.  Allow execution.
+        *result = PR_TRUE;
+    }
     return NS_OK;
 }