Temporary fix for CWS client redirect issue to undo a regression.

content/browser/web_contents/web_contents_impl.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 "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 3132 matching lines @@
       params.transition = render_manager_.web_ui()->GetLinkTransitionType();
 
     // Note also that we hide the referrer for Web UI pages. We don't really
     // want web sites to see a referrer of "chrome://blah" (and some
     // chrome: URLs might have search terms or other stuff we don't want to
     // send to the site), so we send no referrer.
     params.referrer = Referrer();
 
     // Navigations in Web UI pages count as browser-initiated navigations.
     params.is_renderer_initiated = false;
+
+    // TODO(creis): Remove this line.  In the short term, it fixes a regression
+    // (http://crbug.com/313572) by partially reverting r231370.
+    // The underlying problem is that WebDataSource::replacesCurrentHistoryItem
+    // should be returning false when the CWS goes to the sign-in page.
+    // See http://crbug.com/311721.
+    params.should_replace_current_entry = false;
   }
 
   new_contents = OpenURL(params);
 
   if (new_contents) {
     // Notify observers.
     FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                       DidOpenRequestedURL(new_contents,
                                           dest_url,
                                           referrer,
@@ skipping 487 matching lines @@
 }
 
 void WebContentsImpl::OnFrameRemoved(
     RenderViewHostImpl* render_view_host,
     int64 frame_id) {
    FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                      FrameDetached(render_view_host, frame_id));
 }
 
 }  // namespace content