chromeos: Add MockDBusThreadManager and mock clients.

chrome/browser/chromeos/dbus/mock_power_manager_client.cc

Index: chrome/browser/chromeos/dbus/mock_power_manager_client.cc
diff --git a/chrome/browser/chromeos/dbus/mock_power_manager_client.cc b/chrome/browser/chromeos/dbus/mock_power_manager_client.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1179179c686a1dd2f5cb533b10324d698b697cb3
--- /dev/null
+++ b/chrome/browser/chromeos/dbus/mock_power_manager_client.cc
@@ -0,0 +1,13 @@
+// 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.
+
+#include "chrome/browser/chromeos/dbus/mock_power_manager_client.h"
+
+namespace chromeos {
+
+MockPowerManagerClient::MockPowerManagerClient() {}
+
+MockPowerManagerClient::~MockPowerManagerClient() {}
+
+}  // namespace chromeos