Remove header dependencies from sequence_checker.h to sequenced_worker_pool.h

ios/chrome/browser/google/google_logo_service.mm

 // Copyright 2014 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.
 
 #include "ios/chrome/browser/google/google_logo_service.h"
 
 #import <Foundation/Foundation.h>
 
 #include "base/bind.h"
 #include "base/strings/sys_string_conversions.h"
+#include "base/threading/sequenced_worker_pool.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "components/search_engines/template_url_service.h"
 #include "components/search_provider_logos/google_logo_api.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/search_engines/template_url_service_factory.h"
 #include "ios/chrome/browser/search_engines/ui_thread_search_terms_data.h"
 #include "ios/web/public/web_thread.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "ui/gfx/image/image.h"
 
@@ skipping 105 matching lines @@
     cached_metadata_ = empty_metadata;
   }
 }
 
 search_provider_logos::Logo GoogleLogoService::GetCachedLogo() {
   search_provider_logos::Logo logo;
   logo.image = cached_image_;
   logo.metadata = cached_metadata_;
   return logo;
 }