Add a component updater for the CLD2 data file.

chrome/browser/component_updater/cld_component_installer.h

+// Copyright 2014 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_COMPONENT_UPDATER_CLD_COMPONENT_INSTALLER_H_
+#define CHROME_BROWSER_COMPONENT_UPDATER_CLD_COMPONENT_INSTALLER_H_
+
+#include "base/files/file_path.h"
+
+namespace component_updater {
+
+class ComponentUpdateService;
+
+void RegisterCldComponent(ComponentUpdateService* cus);
+
+// Places the path to the latest CLD data file into the specified path object.
+// Returns true if and only if the file has been observed to exist at least
+// once and was valid when it was observed; if the method returns false, the
+// path parameter is not modified. This method is completely threadsafe.
+bool GetLatestCldDataFile(base::FilePath* path);
+
+}  // namespace component_updater
+
+#endif  // CHROME_BROWSER_COMPONENT_UPDATER_CLD_COMPONENT_INSTALLER_H_