[Desktop] Add diagnostics about loading the refresh tokens.

components/signin/core/browser/webdata/token_web_data.h

 // 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.
 
 // Chromium settings and storage represent user-selected preferences and
 // information and MUST not be extracted, overwritten or modified except
 // through Chromium defined APIs.
 
 #ifndef COMPONENTS_SIGNIN_CORE_BROWSER_WEBDATA_TOKEN_WEB_DATA_H__
 #define COMPONENTS_SIGNIN_CORE_BROWSER_WEBDATA_TOKEN_WEB_DATA_H__
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/files/file_path.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "components/signin/core/browser/webdata/token_service_table.h"
 #include "components/webdata/common/web_data_results.h"
 #include "components/webdata/common/web_data_service_base.h"
 #include "components/webdata/common/web_data_service_consumer.h"
 #include "components/webdata/common/web_database.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
 class TokenWebDataBackend;
 class WebDatabaseService;
 class WebDataServiceConsumer;
 
+// The result of a get tokens operation.
+struct TokenResult {
+  TokenResult();
+  TokenResult(const TokenResult& other);
+  ~TokenResult();
+
+  TokenServiceTable::Result db_result;
+  std::map<std::string, std::string> tokens;
+};
+
 // TokenWebData is a data repository for storage of authentication tokens.
 
 class TokenWebData : public WebDataServiceBase {
  public:
   TokenWebData(scoped_refptr<WebDatabaseService> wdbs,
                scoped_refptr<base::SingleThreadTaskRunner> ui_thread,
                scoped_refptr<base::SingleThreadTaskRunner> db_thread,
                const ProfileErrorCallback& callback);
 
   TokenWebData(scoped_refptr<base::SingleThreadTaskRunner> ui_thread,
@@ skipping 18 matching lines @@
 
   ~TokenWebData() override;
 
  private:
   scoped_refptr<TokenWebDataBackend> token_backend_;
 
   DISALLOW_COPY_AND_ASSIGN(TokenWebData);
 };
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_WEBDATA_TOKEN_WEB_DATA_H__