Follow-up to bug 1045498. Fix Loop's ui-showcase to load properly. rs=nperriault over irc, NPOTB so DONTBUILD

browser/components/loop/ui/ui-showcase.js

@@ -535,7 +535,7 @@
           Section({name: "UnsupportedBrowserView"}, 
             Example({summary: "Standalone Unsupported Browser"}, 
               React.DOM.div({className: "standalone"}, 
-                UnsupportedBrowserView(null)
+                UnsupportedBrowserView({helper: {isFirefox: returnFalse}})
               )
             )
           ), 

browser/components/loop/ui/ui-showcase.jsx

@@ -535,7 +535,7 @@
           <Section name="UnsupportedBrowserView">
             <Example summary="Standalone Unsupported Browser">
               <div className="standalone">
-                <UnsupportedBrowserView />
+                <UnsupportedBrowserView helper={{isFirefox: returnFalse}}/>
               </div>
             </Example>
           </Section>