The password manager infobar is suppressed when the one-click infobar is

chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.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/renderer_host/chrome_resource_dispatcher_host_delegate.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/logging.h"
@@ skipping 325 matching lines @@
       }
     }
   }
 
   // See if the response contains the X-Auto-Login header.  If so, this was
   // a request for a login page, and the server is allowing the browser to
   // suggest auto-login, if available.
   AutoLoginPrompter::ShowInfoBarIfPossible(request, info->GetChildID(),
                                            info->GetRouteID());
 
+#if defined(ENABLE_ONE_CLICK_SIGNIN)

[tim (not reviewing), 2012/08/17 19:43:14]

How come we're still using an ifdef for this?

Also how do we wind up here exactly?  Is this just for the 200 case, or also the
302 case (i.e. are the calls to show the one-click bar each covering mutually
exclusive cases, or is there some overlap?)

[Roger Tawa OOO till Jul 10th, 2012/08/17 20:09:43]

Not all platforms use one-click sign in, like android and chromeos for example. 
So this feature is turned on only for desktop.

This case handles 200s, its the OnResponseStarted() callback.  The 302 is
handled just below, line 372, in the OnRequestRedirected() callback.

+  // See if the response contains the 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.
+  OneClickSigninHelper::ShowInfoBarIfPossible(request, info->GetChildID(),
+                                              info->GetRouteID());
+#endif
+
   ProfileIOData* io_data = ProfileIOData::FromResourceContext(resource_context);
   if (io_data->resource_prefetch_predictor_observer())
     io_data->resource_prefetch_predictor_observer()->OnResponseStarted(request);
 }
 
 void ChromeResourceDispatcherHostDelegate::OnRequestRedirected(
     const GURL& redirect_url,
     net::URLRequest* request,
     content::ResourceContext* resource_context,
     content::ResourceResponse* response) {
@@ skipping 68 matching lines @@
   if (base::Base64Encode(serialized, &hashed)) {
     // If successful, swap the header value with the new one.
     // Note that the list of IDs and the header could be temporarily out of sync
     // if IDs are added as we are recreating the header, but we're OK with those
     // descrepancies.
     variation_ids_header_ = hashed;
   } else {
     DVLOG(1) << "Failed to base64 encode Variation IDs value: " << serialized;
   }
 }