[Sync] Fix namespaces for the sync_sessions component.

chrome/browser/ui/android/tab_model/tab_model.h

Index: chrome/browser/ui/android/tab_model/tab_model.h
diff --git a/chrome/browser/ui/android/tab_model/tab_model.h b/chrome/browser/ui/android/tab_model/tab_model.h
index 8b53d38c6f5e04b08ef54c7f9a7a8a5acada1509..18fd09e8493c0286c55b7553cffda8d1d0307826 100644
--- a/chrome/browser/ui/android/tab_model/tab_model.h
+++ b/chrome/browser/ui/android/tab_model/tab_model.h
@@ -17,7 +17,6 @@
 #include "content/public/browser/notification_registrar.h"
 
 namespace browser_sync {
-class SyncedWindowDelegate;
 class SyncedWindowDelegateAndroid;
 }
 
@@ -25,6 +24,10 @@ namespace content {
 class WebContents;
 }
 
+namespace sync_sessions {
+class SyncedWindowDelegate;
+}
+
 class Profile;
 class TabAndroid;
 
@@ -35,7 +38,7 @@ class TabModel : public content::NotificationObserver {
  public:
   virtual Profile* GetProfile() const;
   virtual bool IsOffTheRecord() const;
-  virtual browser_sync::SyncedWindowDelegate* GetSyncedWindowDelegate() const;
+  virtual sync_sessions::SyncedWindowDelegate* GetSyncedWindowDelegate() const;
   virtual SessionID::id_type GetSessionId() const;
   virtual const SessionID& SessionId() const;
   virtual sessions::LiveTabContext* GetLiveTabContext() const;