Added classes to enable session sync functionality.

chrome/browser/sessions/tab_restore_service.h

Index: chrome/browser/sessions/tab_restore_service.h
diff --git a/chrome/browser/sessions/tab_restore_service.h b/chrome/browser/sessions/tab_restore_service.h
index 31f22e44c442293e4ea7030aa4bf6f2241fa8c4e..e12b9d1fc974d875461bebf3c4c42983278234e2 100644
--- a/chrome/browser/sessions/tab_restore_service.h
+++ b/chrome/browser/sessions/tab_restore_service.h
@@ -175,6 +175,10 @@ class TabRestoreService : public BaseSessionService {
   // Max number of entries we'll keep around.
   static const size_t kMaxEntries;
 
+  // Creates and add entries to |entries| for each of the windows in |windows|.
+  void CreateEntriesFromWindows(std::vector<SessionWindow*>* windows,
+                                std::vector<Entry*>* entries);
+
  protected:
   virtual void Save();
 
@@ -291,11 +295,6 @@ class TabRestoreService : public BaseSessionService {
   void OnGotPreviousSession(Handle handle,
                             std::vector<SessionWindow*>* windows);
 
-  // Creates and add entries to |entries| for each of the windows in |windows|.
-  void CreateEntriesFromWindows(
-      std::vector<SessionWindow*>* windows,
-      std::vector<Entry*>* entries);
-
   // Converts a SessionWindow into a Window, returning true on success. We use 0
   // as the timestamp here since we do not know when the window/tab was closed.
   bool ConvertSessionWindowToWindow(