[Sync] Componentize synced_tab_delegate

chrome/browser/sync/sessions/page_revisit_broadcaster.h

Index: chrome/browser/sync/sessions/page_revisit_broadcaster.h
diff --git a/chrome/browser/sync/sessions/page_revisit_broadcaster.h b/chrome/browser/sync/sessions/page_revisit_broadcaster.h
index f0c982e55acaa73e1a46843d063816d87506c7f8..38a8a8cce2d7b47119cc843ced7ff01ee1d91142 100644
--- a/chrome/browser/sync/sessions/page_revisit_broadcaster.h
+++ b/chrome/browser/sync/sessions/page_revisit_broadcaster.h
@@ -18,6 +18,10 @@ namespace history {
 class HistoryService;
 }  // namespace history
 
+namespace sync_sessions {
+class SyncSessionsClient;
+}
+
 namespace browser_sync {
 
 class SessionsSyncManager;
@@ -28,6 +32,7 @@ class SessionsSyncManager;
 class PageRevisitBroadcaster {
  public:
   PageRevisitBroadcaster(SessionsSyncManager* sessions,
+                         sync_sessions::SyncSessionsClient* sessions_client,
                          history::HistoryService* history,
                          bookmarks::BookmarkModel* bookmarks);
   ~PageRevisitBroadcaster();
@@ -46,6 +51,9 @@ class PageRevisitBroadcaster {
   static sync_sessions::PageVisitObserver::TransitionType ConvertTransitionEnum(
       const ui::PageTransition original);
 
+  // The client of this sync sessions datatype.
+  sync_sessions::SyncSessionsClient* const sessions_client_;
+
   ScopedVector<sync_sessions::PageVisitObserver> revisit_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(PageRevisitBroadcaster);