[Sync] Fix namespaces for the sync_sessions component.

ios/chrome/browser/ui/webui/history/favicon_source.cc

 // Copyright 2016 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/ui/webui/history/favicon_source.h"
 
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 103 matching lines @@
 }
 
 bool FaviconSource::ShouldReplaceExistingSource() const {
   // Leave the existing DataSource in place, otherwise we'll drop any pending
   // requests on the floor.
   return false;
 }
 
 bool FaviconSource::HandleMissingResource(const IconRequest& request) {
   // If the favicon is not available, try to use the synced favicon.
-  sync_driver::OpenTabsUIDelegate* open_tabs =
+  sync_sessions::OpenTabsUIDelegate* open_tabs =
       sync_service_ ? sync_service_->GetOpenTabsUIDelegate() : nullptr;
 
   scoped_refptr<base::RefCountedMemory> response;
   if (open_tabs &&
       open_tabs->GetSyncedFaviconForPageURL(request.request_path.spec(),
                                             &response)) {
     request.callback.Run(response.get());
     return true;
   }
   return false;
@@ skipping 39 matching lines @@
     ui::ScaleFactor resource_scale_factor =
         ui::GetSupportedScaleFactor(icon_request.device_scale_factor);
     default_favicon =
         ResourceBundle::GetSharedInstance().LoadDataResourceBytesForScale(
             resource_id, resource_scale_factor);
     default_favicons_[favicon_index] = default_favicon;
   }
 
   icon_request.callback.Run(default_favicon);
 }