[Sync] Migrate SyncInternalsMessageHandler off CallJavascriptFunctionUnsafe.

components/sync/driver/about_sync_util.cc

 // Copyright (c) 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.
 
 #include "components/sync/driver/about_sync_util.h"
 
 #include <string>
 #include <utility>
 
 #include "base/location.h"
@@ skipping 260 matching lines @@
 }
 
 }  // namespace
 
 // This function both defines the structure of the message to be returned and
 // its contents.  Most of the message consists of simple fields in about:sync
 // which are grouped into sections and populated with the help of the SyncStat
 // classes defined above.
 std::unique_ptr<base::DictionaryValue> ConstructAboutInformation(
     SyncService* service,
-    SigninManagerBase* signin,
     version_info::Channel channel) {
   std::unique_ptr<base::DictionaryValue> about_info(
       new base::DictionaryValue());
 
   // 'details': A list of sections.
   base::ListValue* stats_list = new base::ListValue();
   // TODO(crbug.com/702230): Remove the usages of raw pointers in this file.
   stats_list->Reserve(12);
 
   // The following lines define the sections and their fields.  For each field,
@@ skipping 135 matching lines @@
 
   if (is_status_valid)
     summary_string.SetValue(service->QuerySyncStatusSummaryString());
 
   server_url.SetValue(service->sync_service_url().spec());
 
   if (is_status_valid && !full_status.sync_id.empty())
     sync_id.SetValue(full_status.sync_id);
   if (is_status_valid && !full_status.invalidator_client_id.empty())
     invalidator_id.SetValue(full_status.invalidator_client_id);
-  if (signin)
-    username.SetValue(signin->GetAuthenticatedAccountInfo().email);
+  if (service->signin())
+    username.SetValue(service->signin()->GetAuthenticatedAccountInfo().email);
 
   const SyncService::SyncTokenStatus& token_status =
       service->GetSyncTokenStatus();
   server_connection.SetValue(GetConnectionStatus(token_status));
   request_token_time.SetValue(
       GetTimeStr(token_status.token_request_time, "n/a"));
   receive_token_time.SetValue(
       GetTimeStr(token_status.token_receive_time, "n/a"));
   std::string err = token_status.last_get_token_error.error_message();
   token_request_status.SetValue(err.empty() ? "OK" : err);
@@ skipping 135 matching lines @@
   }
 
   about_info->Set("type_status", service->GetTypeStatusMap());
 
   return about_info;
 }
 
 }  // namespace sync_ui_util
 
 }  // namespace syncer