[Desktop] Add diagnostics about loading the refresh tokens.

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

 // 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 "components/signin/core/browser/webdata/token_web_data.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted_delete_on_sequence.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 29 matching lines @@
   WebDatabase::State SetTokenForService(
       const std::string& service, const std::string& token, WebDatabase* db) {
     if (TokenServiceTable::FromWebDatabase(db)->SetTokenForService(service,
                                                                    token)) {
       return WebDatabase::COMMIT_NEEDED;
     }
     return WebDatabase::COMMIT_NOT_NEEDED;
   }
 
   std::unique_ptr<WDTypedResult> GetAllTokens(WebDatabase* db) {
-    std::map<std::string, std::string> map;
-    TokenServiceTable::FromWebDatabase(db)->GetAllTokens(&map);
-    return base::MakeUnique<WDResult<std::map<std::string, std::string>>>(
-        TOKEN_RESULT, map);
+    TokenResult result;
+    result.db_result =
+        TokenServiceTable::FromWebDatabase(db)->GetAllTokens(&result.tokens);
+    return base::MakeUnique<WDResult<TokenResult>>(TOKEN_RESULT, result);
   }
 
  protected:
   virtual ~TokenWebDataBackend() {
   }
 
  private:
   friend class base::RefCountedDeleteOnSequence<TokenWebDataBackend>;
   friend class base::DeleteHelper<TokenWebDataBackend>;
 };
 
+TokenResult::TokenResult()
+    : db_result(TokenServiceTable::TOKEN_DB_RESULT_SQL_INVALID_STATEMENT) {}
+TokenResult::TokenResult(const TokenResult& other) = default;
+TokenResult::~TokenResult(){};
+
 TokenWebData::TokenWebData(
     scoped_refptr<WebDatabaseService> wdbs,
     scoped_refptr<base::SingleThreadTaskRunner> ui_thread,
     scoped_refptr<base::SingleThreadTaskRunner> db_thread,
     const ProfileErrorCallback& callback)
     : WebDataServiceBase(wdbs, callback, ui_thread),
       token_backend_(new TokenWebDataBackend(db_thread)) {
 }
 
 void TokenWebData::SetTokenForService(const std::string& service,
@@ skipping 23 matching lines @@
 
 TokenWebData::TokenWebData(
     scoped_refptr<base::SingleThreadTaskRunner> ui_thread,
     scoped_refptr<base::SingleThreadTaskRunner> db_thread)
     : WebDataServiceBase(NULL, ProfileErrorCallback(), ui_thread),
       token_backend_(new TokenWebDataBackend(db_thread)) {
 }
 
 TokenWebData::~TokenWebData() {
 }