Makes pinned tab restore on startup if you haven't enabled session

chrome/browser/tabs/pinned_tab_codec.h

+// Copyright (c) 2010 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_TABS_PINNED_TAB_CODEC_H_
+#define CHROME_BROWSER_TABS_PINNED_TAB_CODEC_H_
+
+#include <string>
+#include <vector>
+
+#include "chrome/browser/browser_init.h"
+#include "googleurl/src/gurl.h"
+
+class Browser;
+class PrefService;
+class Profile;
+
+// PinnedTabCodec is used to read and write the set of pinned tabs to
+// preferences. When Chrome exits the sets of pinned tabs are written to prefs.
+// On startup if the user has not chosen to restore the last session the set of
+// pinned tabs is opened.
+//
+// The entries are stored in preferences as a list of dictionaries, with each
+// dictionary describing the entry.
+class PinnedTabCodec {
+ public:
+  // Registers the preference used by this class.
+  static void RegisterUserPrefs(PrefService* prefs);
+
+  // Resets the preferences state.
+  static void WritePinnedTabs(Profile* profile);
+
+  // Reads and returns the set of pinned tabs to restore from preferences.
+  static std::vector<BrowserInit::LaunchWithProfile::Tab> ReadPinnedTabs(
+      Profile* profile);
+
+ private:
+  PinnedTabCodec();
+  ~PinnedTabCodec();
+
+  DISALLOW_COPY_AND_ASSIGN(PinnedTabCodec);
+};
+
+#endif  // CHROME_BROWSER_TABS_PINNED_TAB_CODEC_H_