Add DBusStatistics and DBusLogSource to log and show dbus stats

chrome/browser/chromeos/system_logs/dbus_log_source.cc

Index: chrome/browser/chromeos/system_logs/dbus_log_source.cc
diff --git a/chrome/browser/chromeos/system_logs/dbus_log_source.cc b/chrome/browser/chromeos/system_logs/dbus_log_source.cc
new file mode 100644
index 0000000000000000000000000000000000000000..bed65eb730cbabad9783b75b4548b981d1fd4837
--- /dev/null
+++ b/chrome/browser/chromeos/system_logs/dbus_log_source.cc
@@ -0,0 +1,32 @@
+// 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/chromeos/system_logs/dbus_log_source.h"
+
+#include "chrome/browser/chromeos/system_logs/system_logs_fetcher.h"
+#include "content/public/browser/browser_thread.h"
+#include "dbus/dbus_statistics.h"
+
+namespace chromeos {
+
+namespace {
+const char kDBusLogEntryShort[] = "dbus_summary";
+const char kDBusLogEntryLong[] = "dbus_details";
+}
+
+void DBusLogSource::Fetch(const SysLogsSourceCallback& callback) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  DCHECK(!callback.is_null());
+
+  SystemLogsResponse response;
+  response[kDBusLogEntryShort] = dbus::statistics::GetAsString(
+      dbus::statistics::SHOW_INTERFACE,
+      dbus::statistics::FORMAT_ALL);
+  response[kDBusLogEntryLong] = dbus::statistics::GetAsString(
+      dbus::statistics::SHOW_METHOD,
+      dbus::statistics::FORMAT_TOTALS);
+  callback.Run(&response);
+}
+
+}  // namespace chromeos