| Index: chrome/browser/ui/browser_tab_contents.cc | 
| diff --git a/chrome/browser/ui/browser_tab_contents.cc b/chrome/browser/ui/browser_tab_contents.cc | 
| index ef5079e73fba83a894bf4ac6f9ed0c3e47749c83..dfd6f5475a070fc6754a40105089e9f4e1458de8 100644 | 
| --- a/chrome/browser/ui/browser_tab_contents.cc | 
| +++ b/chrome/browser/ui/browser_tab_contents.cc | 
| @@ -47,6 +47,7 @@ | 
| #include "chrome/browser/ui/search_engines/search_engine_tab_helper.h" | 
| #include "chrome/browser/ui/sync/tab_contents_synced_tab_delegate.h" | 
| #include "chrome/browser/ui/tab_contents/core_tab_helper.h" | 
| +#include "chrome/browser/ui/web_applications/hosted_app_tab_helper.h" | 
| #include "chrome/browser/ui/zoom/zoom_controller.h" | 
| #include "chrome/common/chrome_switches.h" | 
| #include "components/autofill/content/browser/autofill_driver_impl.h" | 
| @@ -204,4 +205,8 @@ void BrowserTabContents::AttachTabHelpers(WebContents* web_contents) { | 
| #if defined(OS_WIN) | 
| MetroPinTabHelper::CreateForWebContents(web_contents); | 
| #endif | 
| + | 
| +  if (CommandLine::ForCurrentProcess()->HasSwitch( | 
| +      switches::kEnableStreamlinedHostedApps)) | 
| +    HostedAppTabHelper::CreateForWebContents(web_contents); | 
| } | 
|  |