don't display platform app resources in normal browser windows

chrome/browser/ui/browser_navigator.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/browser_navigator.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/stringprintf.h"
@@ skipping 378 matching lines @@
 
 void Navigate(NavigateParams* params) {
   Browser* source_browser = params->browser;
   if (source_browser)
     params->initiating_profile = source_browser->profile();
   DCHECK(params->initiating_profile);
 
   if (!AdjustNavigateParamsForURL(params))
     return;
 
+  ExtensionService* service = params->initiating_profile->GetExtensionService();
+  if (service)
+    service->ShouldBlockUrlInBrowserTab(&params->url);
+
   // The browser window may want to adjust the disposition.
   if (params->disposition == NEW_POPUP &&
       source_browser &&
       source_browser->window()) {
     params->disposition =
         source_browser->window()->GetDispositionForPopupBounds(
             params->window_bounds);
   }
 
   params->browser = GetBrowserForDisposition(params);
@@ skipping 186 matching lines @@
   return !(url.scheme() == chrome::kChromeUIScheme &&
       (url.host() == chrome::kChromeUISettingsHost ||
        url.host() == chrome::kChromeUISettingsFrameHost ||
        url.host() == chrome::kChromeUIExtensionsHost ||
        url.host() == chrome::kChromeUIBookmarksHost ||
        url.host() == chrome::kChromeUISyncPromoHost ||
        url.host() == chrome::kChromeUIUberHost));
 }
 
 }  // namespace chrome