Moves NavigationController::session_id into RestoreTabHelper.

BUG=none
TEST=none
R=nick@chromium.org,mpcomplete@chromium.org,jam@chromium.org

Review URL: http://codereview.chromium.org/7104064

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@89083 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 44 insertions, 0 deletions

diff --git a/chrome/browser/sessions/restore_tab_helper.h b/chrome/browser/sessions/restore_tab_helper.h
new file mode 100644
index 0000000..63aee3b
--- /dev/null
+++ b/chrome/browser/sessions/restore_tab_helper.h
@@ -0,0 +1,44 @@
+// Copyright (c) 2011 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_SESSIONS_RESTORE_TAB_HELPER_H_
+#define CHROME_BROWSER_SESSIONS_RESTORE_TAB_HELPER_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "chrome/browser/sessions/session_id.h"
+#include "content/browser/tab_contents/tab_contents_observer.h"
+
+class TabContentsWrapper;
+
+class RestoreTabHelper : public TabContentsObserver {
+ public:
+  explicit RestoreTabHelper(TabContentsWrapper* tab);
+  ~RestoreTabHelper();
+
+  // Returns the identifier used by session restore for this tab.
+  const SessionID& session_id() const { return session_id_; }
+
+  // Identifier of the window the tab is in.
+  void SetWindowID(const SessionID& id);
+  const SessionID& window_id() const { return window_id_; }
+
+  // TabContentsObserver:
+  virtual void RenderViewCreated(RenderViewHost* render_view_host) OVERRIDE;
+
+ private:
+  TabContentsWrapper* tab_;
+
+  // Unique identifier of the tab for session restore. This id is only unique
+  // within the current session, and is not guaranteed to be unique across
+  // sessions.
+  const SessionID session_id_;
+
+  // Unique identifier of the window the tab is in.
+  SessionID window_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(RestoreTabHelper);
+};
+
+#endif  // CHROME_BROWSER_SESSIONS_RESTORE_TAB_HELPER_H_