Implement one click login.

chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc

Index: chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc
===================================================================
--- chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc	(revision 123466)
+++ chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.cc	(working copy)
@@ -22,6 +22,7 @@
 #include "chrome/browser/renderer_host/safe_browsing_resource_throttle.h"
 #include "chrome/browser/renderer_host/transfer_navigation_resource_throttle.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
+#include "chrome/browser/signin/one_click_signin.h"
 #include "chrome/browser/ui/auto_login_prompter.h"
 #include "chrome/browser/ui/login/login_prompt.h"
 #include "chrome/common/chrome_notification_types.h"
@@ -329,4 +330,15 @@
     net::URLRequest* request,
     content::ResourceResponse* response) {
   LoadTimingObserver::PopulateTimingInfo(request, response);
+
+#if !defined(OS_CHROMEOS)
+  ResourceDispatcherHostRequestInfo* info =
+      resource_dispatcher_host_->InfoForRequest(request);
+
+  // See if the response contains the X-Google-Accounts-SignIn header.  If so,
+  // then the user has just finished signing in, and the server is allowing the
+  // browser to suggest connecting the user's profile to the account.
+  OneClickSigninManager::ShowInfoBarIfPossible(request, info->child_id(),
+                                               info->route_id());
+#endif
 }