Add skeleton plumbing for serial API. No functionality yet.

chrome/browser/extensions/api/serial/serial_api.h

Index: chrome/browser/extensions/api/serial/serial_api.h
diff --git a/chrome/browser/extensions/api/serial/serial_api.h b/chrome/browser/extensions/api/serial/serial_api.h
new file mode 100644
index 0000000000000000000000000000000000000000..df4c3e0256f9f7f90c5803f8cc984745d17605d8
--- /dev/null
+++ b/chrome/browser/extensions/api/serial/serial_api.h
@@ -0,0 +1,53 @@
+// 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_SERIAL_SERIAL_API_H_
+#define CHROME_BROWSER_EXTENSIONS_API_SERIAL_SERIAL_API_H_
+#pragma once
+
+#include <string>
+
+#include "chrome/browser/extensions/extension_function.h"
+
+namespace extensions {
+
+extern const char kConnectionIdKey[];
+
+class SerialOpenFunction : public AsyncExtensionFunction {
+ public:
+  SerialOpenFunction();
+  virtual ~SerialOpenFunction();
+
+  virtual bool RunImpl() OVERRIDE;
+
+ protected:
+  void WorkOnIOThread();
+  void RespondOnUIThread();
+
+ private:
+  std::string port_;
+
+  DECLARE_EXTENSION_FUNCTION_NAME("experimental.serial.open")
+};
+
+class SerialCloseFunction : public AsyncExtensionFunction {
+ public:
+  SerialCloseFunction();
+  virtual ~SerialCloseFunction();
+
+  virtual bool RunImpl() OVERRIDE;
+
+ protected:
+  void WorkOnIOThread();
+  void RespondOnUIThread();
+
+ private:
+  int connection_id_;
+
+  DECLARE_EXTENSION_FUNCTION_NAME("experimental.serial.close")
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_SERIAL_SERIAL_API_H_