Add the implementation skeleton for systeminfo.cpu API

chrome/browser/extensions/api/system_info_cpu/cpu_info_provider.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_EXTENSIONS_API_SYSTEM_INFO_CPU_CPU_INFO_PROVIDER_H_
+#define CHROME_BROWSER_EXTENSIONS_API_SYSTEM_INFO_CPU_CPU_INFO_PROVIDER_H_
+
+#include "chrome/common/extensions/api/experimental_system_info_cpu.h"
+
+namespace extensions {
+
+// An interface for retrieving cpu information on different platforms.
+class CpuInfoProvider {
+ public:
+   // Return a CpuInfoProvider instance. The caller is responsible for
+   // releasing it.
+   static CpuInfoProvider* Create();
+
+   virtual ~CpuInfoProvider() {}
+
+   // Return true if succeed to get CPU information, otherwise return false.
+   // Should be implemented on different platforms.
+   virtual bool GetCpuInfo(
+       api::experimental_system_info_cpu::CpuInfo* info) = 0;
+};
+
+}  // namespace extensions
+#endif  // CHROME_BROWSER_EXTENSIONS_API_SYSTEM_INFO_CPU_CPU_INFO_PROVIDER_H_