don't display platform app resources in normal browser windows

chrome/browser/ui/browser_navigator.cc

Index: chrome/browser/ui/browser_navigator.cc
diff --git a/chrome/browser/ui/browser_navigator.cc b/chrome/browser/ui/browser_navigator.cc
index 0b41fdaf58a7332a090f3a77a2b9490bf0a1d23b..092bf37b76c0ca90dcbd5e2f7b5558cc47f3faaf 100644
--- a/chrome/browser/ui/browser_navigator.cc
+++ b/chrome/browser/ui/browser_navigator.cc
@@ -326,6 +326,13 @@ bool SwapInPrerender(TabContents* target_contents, const GURL& url) {
       prerender_manager->MaybeUsePrerenderedPage(web_contents, url);
 }
 
+// Returns true if |url| is something we should try to avoid showing as a main
+// frame in a normal browser window.
+bool ShouldNotDisplayUrlInBrowser(Profile* profile, const GURL& url) {
+  ExtensionService* service = profile->GetExtensionService();
+  return service && service->ShouldNotDisplayUrlInBrowserTab(url);
+}
+
 }  // namespace
 
 namespace chrome {
@@ -393,6 +400,9 @@ void Navigate(NavigateParams* params) {
   if (!AdjustNavigateParamsForURL(params))
     return;
 
+  if (ShouldNotDisplayUrlInBrowser(params->initiating_profile, params->url))
+    return;
+
   // The browser window may want to adjust the disposition.
   if (params->disposition == NEW_POPUP &&
       source_browser &&