Added interstitial page for merge session.

chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc

Index: chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
diff --git a/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc b/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
index bf74c49c721d55c63148b6fbb5884d63ef83a0c3..d35292bcc46f31dd51a37ac9159a77b6fe874b59 100644
--- a/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
+++ b/chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
@@ -60,6 +60,7 @@
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/extensions/file_browser_resource_throttle.h"
+#include "chrome/browser/chromeos/login/merge_session_throttle.h"
 // TODO(oshima): Enable this for other platforms.
 #include "chrome/browser/renderer_host/offline_resource_throttle.h"
 #endif
@@ -162,6 +163,11 @@ void ChromeResourceDispatcherHostDelegate::RequestBeginning(
     // block unsafe site after we remove offline page.
     throttles->push_back(new OfflineResourceThrottle(
         child_id, route_id, request, appcache_service));
+    // Add interstitial page while merge session process (cookie
+    // reconstruction from OAuth2 refresh token in ChromeOS login) is still in
+    // progress while we are attempting to load a google property.
+    throttles->push_back(new MergeSessionThrottle(
+        child_id, route_id, request));
   }
 #endif