Do not submit: high level overview patch.

chrome/browser/sync/glue/synced_tab_delegate.h

Index: chrome/browser/sync/glue/synced_tab_delegate.h
diff --git a/chrome/browser/sync/glue/synced_tab_delegate.h b/chrome/browser/sync/glue/synced_tab_delegate.h
index 9e56748e035c382cc75a7bb7bcf4afa146adc015..443a25806b452f2657078d7c19f6eb1f6194b16a 100644
--- a/chrome/browser/sync/glue/synced_tab_delegate.h
+++ b/chrome/browser/sync/glue/synced_tab_delegate.h
@@ -25,8 +25,8 @@ class SyncedTabDelegate {
 
   // Methods from TabContents.
 
-  virtual SessionID::id_type GetWindowId() const = 0;
-  virtual SessionID::id_type GetSessionId() const = 0;
+  virtual const SessionID& GetWindowId() const = 0;
+  virtual const SessionID& GetSessionId() const = 0;
   virtual bool IsBeingDestroyed() const = 0;
   virtual Profile* profile() const = 0;
 
@@ -42,6 +42,9 @@ class SyncedTabDelegate {
   virtual content::NavigationEntry* GetPendingEntry() const = 0;
   virtual content::NavigationEntry* GetEntryAtIndex(int i) const = 0;
   virtual content::NavigationEntry* GetActiveEntry() const = 0;
+  virtual int64 GetSyncSessionId() const = 0;
+  virtual void SetSyncSessionId(const int64 sync_id) = 0;
+  virtual bool IsTabInMemory() const = 0;
 
   virtual bool IsPinned() const = 0;
 };