[sync] Prevent sessions flare on startup

chrome/browser/sync/sessions/sync_sessions_web_contents_router.h

 // Copyright 2017 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_SYNC_SESSIONS_SYNC_SESSIONS_WEB_CONTENTS_ROUTER_H_
 #define CHROME_BROWSER_SYNC_SESSIONS_SYNC_SESSIONS_WEB_CONTENTS_ROUTER_H_
 
 #include "base/callback_list.h"
 
 // Android has no BrowserList or TabStripModel, so we exclude code that refers
@@ skipping 18 matching lines @@
 // class is responsible for notifying Sessions Sync when local tabs are
 // modified. It does this by forwarding the events pushed to it by individual
 // WebContentsObservers, which are scoped to a single WebContents/tab.
 class SyncSessionsWebContentsRouter : public LocalSessionEventRouter,
                                       public KeyedService {
  public:
   explicit SyncSessionsWebContentsRouter(Profile* profile);
 
   // Notify the router that the tab corresponding to |web_contents| has been
   // modified in some way.
-  void NotifyTabModified(content::WebContents* web_contents);
+  void NotifyTabModified(content::WebContents* web_contents,
+                         bool page_load_completed);
   // Inject a flare that can be used to start sync. See the comment for
   // StartSyncFlare in syncable_service.h for more.
   void InjectStartSyncFlare(syncer::SyncableService::StartSyncFlare flare);
 
   // SessionsSyncManager::LocalEventRouter implementation.
   void StartRoutingTo(LocalSessionEventHandler* handler) override;
   void Stop() override;
 
   // KeyedService implementation.
   void Shutdown() override;
@@ skipping 13 matching lines @@
 #if !defined(OS_ANDROID)
   std::unique_ptr<BrowserListRouterHelper> browser_list_helper_;
 #endif  // !defined(OS_ANDROID)
 
   DISALLOW_COPY_AND_ASSIGN(SyncSessionsWebContentsRouter);
 };
 
 }  // namespace sync_sessions
 
 #endif  // CHROME_BROWSER_SYNC_SESSIONS_SYNC_SESSIONS_WEB_CONTENTS_ROUTER_H_