[Sync] Migrate SyncInternalsMessageHandler off CallJavascriptFunctionUnsafe.

ios/chrome/browser/ui/webui/sync_internals/sync_internals_message_handler.cc

 // Copyright 2015 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/sync_internals/sync_internals_message_handler.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "base/values.h"
 #include "components/browser_sync/profile_sync_service.h"
-#include "components/signin/core/browser/signin_manager.h"
 #include "components/sync/base/weak_handle.h"
 #include "components/sync/driver/about_sync_util.h"
 #include "components/sync/driver/sync_service.h"
 #include "components/sync/engine/cycle/commit_counters.h"
 #include "components/sync/engine/cycle/status_counters.h"
 #include "components/sync/engine/cycle/update_counters.h"
 #include "components/sync/engine/events/protocol_event.h"
 #include "components/sync/js/js_event_details.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
-#include "ios/chrome/browser/signin/signin_manager_factory.h"
 #include "ios/chrome/browser/sync/ios_chrome_profile_sync_service_factory.h"
 #include "ios/chrome/common/channel_info.h"
 #include "ios/web/public/web_thread.h"
 #include "ios/web/public/webui/web_ui_ios.h"
 
 using syncer::JsEventDetails;
 using syncer::ModelTypeSet;
 using syncer::WeakHandle;
 
 SyncInternalsMessageHandler::SyncInternalsMessageHandler()
@@ skipping 169 matching lines @@
 
 void SyncInternalsMessageHandler::HandleJsEvent(const std::string& name,
                                                 const JsEventDetails& details) {
   DVLOG(1) << "Handling event: " << name << " with details "
            << details.ToString();
   web_ui()->CallJavascriptFunction(syncer::sync_ui_util::kDispatchEvent,
                                    base::Value(name), details.Get());
 }
 
 void SyncInternalsMessageHandler::SendAboutInfo() {
-  ios::ChromeBrowserState* browser_state =
-      ios::ChromeBrowserState::FromWebUIIOS(web_ui());
-  SigninManager* signin_manager =
-      ios::SigninManagerFactory::GetForBrowserState(browser_state);
   syncer::SyncService* sync_service = GetSyncService();
   std::unique_ptr<base::DictionaryValue> value =
-      syncer::sync_ui_util::ConstructAboutInformation(
-          sync_service, signin_manager, GetChannel());
+      syncer::sync_ui_util::ConstructAboutInformation(sync_service,
+                                                      GetChannel());
   web_ui()->CallJavascriptFunction(
       syncer::sync_ui_util::kDispatchEvent,
       base::Value(syncer::sync_ui_util::kOnAboutInfoUpdated), *value);
 }
 
 // Gets the SyncService of the underlying original profile. May return null.
 syncer::SyncService* SyncInternalsMessageHandler::GetSyncService() {
   ios::ChromeBrowserState* browser_state =
       ios::ChromeBrowserState::FromWebUIIOS(web_ui());
   return IOSChromeProfileSyncServiceFactory::GetForBrowserState(
       browser_state->GetOriginalChromeBrowserState());
 }