Add DBusStatistics and DBusLogSource to log and show dbus stats

chrome/browser/chromeos/system_logs/dbus_log_source.h

 // 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.
 
-#ifndef CHROME_BROWSER_CHROMEOS_SYSTEM_LOGS_MEMORY_DETAILS_LOG_SOURCE_H_
-#define CHROME_BROWSER_CHROMEOS_SYSTEM_LOGS_MEMORY_DETAILS_LOG_SOURCE_H_
+#ifndef CHROME_BROWSER_CHROMEOS_SYSTEM_LOGS_DBUS_LOG_SOURCE_H_
+#define CHROME_BROWSER_CHROMEOS_SYSTEM_LOGS_DBUS_LOG_SOURCE_H_
 
 #include "chrome/browser/chromeos/system_logs/system_logs_fetcher.h"
 
 namespace chromeos {
 
 // Fetches memory usage details.
-class MemoryDetailsLogSource : public SystemLogsSource {
+class DBusLogSource : public SystemLogsSource {
  public:
-  MemoryDetailsLogSource() {}
-  virtual ~MemoryDetailsLogSource() {}
+  DBusLogSource() {}
+  virtual ~DBusLogSource() {}
 
   // SystemLogsSource override.
   virtual void Fetch(const SysLogsSourceCallback& request) OVERRIDE;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(MemoryDetailsLogSource);
+  DISALLOW_COPY_AND_ASSIGN(DBusLogSource);
 };
 
 }  // namespace chromeos
 
-#endif  // CHROME_BROWSER_CHROMEOS_SYSTEM_LOGS_MEMORY_DETAILS_LOG_SOURCE_H_
+#endif  // CHROME_BROWSER_CHROMEOS_SYSTEM_LOGS_DBUS_LOG_SOURCE_H_