wstring: remove wstrings from ChildProcessInfo

chrome/browser/metrics/metrics_service.h

 // Copyright (c) 2011 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.
 
 // This file defines a service that collects information about the user
 // experience in order to help improve future versions of the app.
 
 #ifndef CHROME_BROWSER_METRICS_METRICS_SERVICE_H_
 #define CHROME_BROWSER_METRICS_METRICS_SERVICE_H_
 #pragma once
@@ skipping 384 matching lines @@
   // Maps NavigationControllers (corresponding to tabs) or Browser
   // (corresponding to Windows) to a unique integer that we will use to identify
   // it. |next_window_id_| is used to track which IDs we have used so far.
   typedef std::map<uintptr_t, int> WindowMap;
   WindowMap window_map_;
   int next_window_id_;
 
   // Buffer of child process notifications for quick access.  See
   // ChildProcessStats documentation above for more details.
   struct ChildProcessStats;
-  std::map<std::wstring, ChildProcessStats> child_process_stats_buffer_;
+  std::map<string16, ChildProcessStats> child_process_stats_buffer_;
 
   ScopedRunnableMethodFactory<MetricsService> log_sender_factory_;
   ScopedRunnableMethodFactory<MetricsService> state_saver_factory_;
 
   // Dictionary containing all the profile specific metrics. This is set
   // at creation time from the prefs.
   scoped_ptr<base::DictionaryValue> profile_dictionary_;
 
   // The scheduler for determining when uploads should happen.
   scoped_ptr<MetricsReportingScheduler> scheduler_;
@@ skipping 15 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(MetricsServiceTest, CorruptSizeOfLogList);
   FRIEND_TEST_ALL_PREFIXES(MetricsServiceTest, CorruptChecksumOfLogList);
   FRIEND_TEST_ALL_PREFIXES(MetricsServiceTest, ClientIdGeneratesAllZeroes);
   FRIEND_TEST_ALL_PREFIXES(MetricsServiceTest, ClientIdGeneratesCorrectly);
   FRIEND_TEST_ALL_PREFIXES(MetricsServiceTest, ClientIdCorrectlyFormatted);
 
   DISALLOW_COPY_AND_ASSIGN(MetricsService);
 };
 
 #endif  // CHROME_BROWSER_METRICS_METRICS_SERVICE_H_