Use high resolution icons where possible for streamlined hosted app icons.

chrome/browser/ui/browser_tab_contents.cc

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..9f58e8a2c2bfe8a8fe2bd106ee4b882cbef2e441 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"
@@ -138,6 +139,7 @@ void BrowserTabContents::AttachTabHelpers(WebContents* web_contents) {
   FaviconTabHelper::CreateForWebContents(web_contents);
   FindTabHelper::CreateForWebContents(web_contents);
   HistoryTabHelper::CreateForWebContents(web_contents);
+  HostedAppTabHelper::CreateForWebContents(web_contents);
   HungPluginTabHelper::CreateForWebContents(web_contents);
   InfoBarService::CreateForWebContents(web_contents);
   NavigationMetricsRecorder::CreateForWebContents(web_contents);