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

chrome/browser/tabs/pinned_tab_service.h

Index: chrome/browser/tabs/pinned_tab_service.h
diff --git a/chrome/browser/tabs/pinned_tab_service.h b/chrome/browser/tabs/pinned_tab_service.h
new file mode 100644
index 0000000000000000000000000000000000000000..3437857cfe9750318097fb0e82e103286737f977
--- /dev/null
+++ b/chrome/browser/tabs/pinned_tab_service.h
@@ -0,0 +1,41 @@
+// 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_SERVICE_H_
+#define CHROME_BROWSER_TABS_PINNED_TAB_SERVICE_H_
+
+#include "chrome/common/notification_observer.h"
+#include "chrome/common/notification_registrar.h"
+
+class Browser;
+class Profile;
+
+// PinnedTabService is responsible for updating preferences with the set of
+// pinned tabs to restore at startup. PinnedTabService listens for the
+// appropriate set of notifications to know it should update preferences.
+class PinnedTabService : public NotificationObserver {
+ public:
+  explicit PinnedTabService(Profile* profile);
+
+ private:
+  // Invoked when we're about to exit.
+  void GotExit();
+
+  // NotificationObserver.
+  virtual void Observe(NotificationType type,
+                       const NotificationSource& source,
+                       const NotificationDetails& details);
+
+  Profile* profile_;
+
+  // If true we've seen an exit event (or the last browser is closing which
+  // triggers an exit) and can ignore all other events.
+  bool got_exiting_;
+
+  NotificationRegistrar registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(PinnedTabService);
+};
+
+#endif  // CHROME_BROWSER_TABS_PINNED_TAB_SERVICE_H_