[ios] Removed CookieStoreIOS::UnSynchronize.

ios/chrome/app/main_controller.mm

 // Copyright 2012 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.
 
 #import "ios/chrome/app/main_controller.h"
 
 #include <memory>
 #include <string>
 
 #import <CoreSpotlight/CoreSpotlight.h>
@@ skipping 199 matching lines @@
       GetApplicationContext()->GetComponentUpdateService();
   DCHECK(cus);
   base::FilePath path;
   const bool success = PathService::Get(ios::DIR_USER_DATA, &path);
   DCHECK(success);
   // CRLSetFetcher attempts to load a CRL set from either the local disk or
   // network.
   GetApplicationContext()->GetCRLSetFetcher()->StartInitialLoad(cus, path);
 }
 
-// Unsynchronizes the cookie store associated to |browserState| on the IO
-// thread.
-void UnSynchronizeCookieStore(ios::ChromeBrowserState* browserState) {
-  DCHECK(browserState);
-  scoped_refptr<net::URLRequestContextGetter> getter =
-      browserState->GetRequestContext();
-  web::WebThread::PostTask(
-      web::WebThread::IO, FROM_HERE, base::BindBlock(^{
-        net::CookieStoreIOS* store = static_cast<net::CookieStoreIOS*>(
-            getter->GetURLRequestContext()->cookie_store());
-        store->UnSynchronize();
-      }));
-}
-
 // Returns YES if |url| matches chrome://newtab.
 BOOL IsURLNtp(const GURL& url) {
   return UrlHasChromeScheme(url) && url.host() == kChromeUINewTabHost;
 }
 
 // Used to update the current BVC mode if a new tab is added while the stack
 // view is being dimissed.  This is different than ApplicationMode in that it
 // can be set to |NONE| when not in use.
 enum class StackViewDismissalMode { NONE, NORMAL, INCOGNITO };
 
@@ skipping 1495 matching lines @@
 
   // Tell the BVC that was made current that it can use the web.
   [self activateCurrentBVC];
 }
 
 #pragma mark - Tab closure handlers
 
 - (void)lastIncognitoTabClosed {
   DCHECK(_mainBrowserState->HasOffTheRecordChromeBrowserState());
   [self clearIOSSpecificIncognitoData];
-  UnSynchronizeCookieStore(
-      _mainBrowserState->GetOffTheRecordChromeBrowserState());
 
   // OffTheRecordProfileIOData cannot be deleted before all the requests are
   // deleted. All of the request trackers associated with the closed OTR tabs
   // will have posted CancelRequest calls to the IO thread by now; this just
   // waits for those calls to run before calling |deleteIncognitoBrowserState|.
   web::RequestTrackerImpl::RunAfterRequestsCancel(base::BindBlock(^{
     [self deleteIncognitoBrowserState];
   }));
 
   // a) The first condition can happen when the last incognito tab is closed
@@ skipping 947 matching lines @@
   };
 
   callbackCounter->IncrementCount();
   [self removeBrowsingDataFromBrowserState:_mainBrowserState
                                       mask:removeAllMask
                                 timePeriod:browsing_data::ALL_TIME
                          completionHandler:decrementCallbackCounterCount];
 }
 
 @end