Added interstitial page for merge session.

chrome/browser/chromeos/login/merge_session_throttle.h

Index: chrome/browser/chromeos/login/merge_session_throttle.h
diff --git a/chrome/browser/chromeos/login/merge_session_throttle.h b/chrome/browser/chromeos/login/merge_session_throttle.h
new file mode 100644
index 0000000000000000000000000000000000000000..ad1b2581d3f65409afab7b5782c154b4a32b1352
--- /dev/null
+++ b/chrome/browser/chromeos/login/merge_session_throttle.h
@@ -0,0 +1,51 @@
+// Copyright (c) 2013 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.
+
+#ifndef CHROME_BROWSER_CHROMEOS_LOGIN_MERGE_SESSION_THROTTLE_H_
+#define CHROME_BROWSER_CHROMEOS_LOGIN_MERGE_SESSION_THROTTLE_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "chrome/browser/chromeos/login/merge_session_load_page.h"
+#include "content/public/browser/resource_throttle.h"
+#include "net/base/completion_callback.h"
+
+namespace net {
+class URLRequest;
+}
+
+// Used to show an 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.
+class MergeSessionThrottle
+    : public content::ResourceThrottle,
+      public base::SupportsWeakPtr<MergeSessionThrottle> {
+ public:
+  MergeSessionThrottle(int render_process_id,
+                       int render_view_id,
+                       net::URLRequest* request);
+  virtual ~MergeSessionThrottle();
+
+  // content::ResourceThrottle implementation:
+  virtual void WillStartRequest(bool* defer) OVERRIDE;
+
+ private:
+  // MergeSessionLoadPage callback.
+  void OnBlockingPageComplete();
+
+  // Erase the state associated with a deferred load request.
+  void ClearRequestInfo();
+  bool IsRemote(const GURL& url) const;
+
+  // True if we should show the merge session in progress page.
+  bool ShouldShowMergeSessionPage(const GURL& url) const;
+
+  int render_process_id_;
+  int render_view_id_;
+  net::URLRequest* request_;
+
+  DISALLOW_COPY_AND_ASSIGN(MergeSessionThrottle);
+};
+
+#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_MERGE_SESSION_THROTTLE_H_