Add the implementation skeleton for systeminfo.cpu API

chrome/browser/extensions/api/systeminfo_cpu/systeminfo_cpu_api.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_SYSTEMINFO_CPU_SYSTEMINFO_CPU_API_H_
+#define CHROME_BROWSER_EXTENSIONS_API_SYSTEMINFO_CPU_SYSTEMINFO_CPU_API_H_
+
+#include "chrome/browser/extensions/extension_function.h"
+
+namespace extensions {
+
+class CpuInfoProvider;
+
+class SysteminfoCpuGetFunction : public AsyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION_NAME("experimental.systeminfo.cpu.get");

[Mihai Parparita -not on Chrome, 2012/08/10 20:24:56]

Can you capitalize the "info" in "systeminfo" (and in the classname too)? Other
two-word APIs (webRequest, webNavigation, contextMenus) also use camel-case.

[Hongbo Min, 2012/08/12 14:22:44]

Done.

+  SysteminfoCpuGetFunction();
+  virtual ~SysteminfoCpuGetFunction();
+
+ private:
+  virtual bool RunImpl() OVERRIDE;
+  void WorkOnFileThread();
+  void RespondOnUIThread(bool success);
+  void GetCpuInfoOnFileThread();
+
+  // The CpuInfoProvider instance, lives on FILE thread.
+  CpuInfoProvider* provider_;
+};
+
+class SysteminfoCpuSetUpdateIntervalFunction : public AsyncExtensionFunction {

[Mihai Parparita -not on Chrome, 2012/08/10 20:24:56]

If this is a no-op, can you remove this from the CL?

[Hongbo Min, 2012/08/12 14:22:44]

Remove setUpdateInterval from cc and idl file.

Done.

+ public:
+  DECLARE_EXTENSION_FUNCTION_NAME("experimental.systeminfo.cpu.get");
+  SysteminfoCpuSetUpdateIntervalFunction() {}
+  virtual ~SysteminfoCpuSetUpdateIntervalFunction() {}
+
+ private:
+  virtual bool RunImpl() OVERRIDE {
+    // TODO(hmin): not implemented yet
+    return false;
+  }
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_SYSTEMINFO_CPU_SYSTEMINFO_CPU_API_H_