Move part of metrics from chrome/common to components

chrome/browser/metrics/metrics_log_serializer.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 "chrome/browser/metrics/metrics_log_serializer.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/md5.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/scoped_user_pref_update.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/common/pref_names.h"
 
+using metrics::MetricsLogBase;
+using metrics::MetricsLogManager;
+
 namespace {
 
 // The number of "initial" logs to save, and hope to send during a future Chrome
 // session.  Initial logs contain crash stats, and are pretty small.
 const size_t kInitialLogsPersistLimit = 20;
 
 // The number of ongoing logs to save persistently, and hope to
 // send during a this or future sessions.  Note that each log may be pretty
 // large, as presumably the related "initial" log wasn't sent (probably nothing
 // was, as the user was probably off-line).  As a result, the log probably kept
@@ skipping 187 matching lines @@
   if (!valid) {
     local_list->clear();
     return MakeRecallStatusHistogram(CHECKSUM_STRING_CORRUPTION);
   }
   if (recovered_md5 != base::MD5DigestToBase16(digest)) {
     local_list->clear();
     return MakeRecallStatusHistogram(CHECKSUM_CORRUPTION);
   }
   return MakeRecallStatusHistogram(RECALL_SUCCESS);
 }