Update GlobalShortcut API design.

* Rename Shortcut API to GlobalShortcut for better suite.
* Implement the new design interfaces.
* Put the chromium related source code to the same directory as in chrome.

atom/browser/api/atom_api_global_shortcut.h

@@ -0,0 +1,54 @@
+// Copyright (c) 2014 GitHub, Inc. All rights reserved.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_BROWSER_API_ATOM_API_GLOBAL_SHORTCUT_H_
+#define ATOM_BROWSER_API_ATOM_API_GLOBAL_SHORTCUT_H_
+
+#include <map>
+#include <string>
+
+#include "base/callback.h"
+#include "chrome/browser/extensions/global_shortcut_listener.h"
+#include "native_mate/wrappable.h"
+#include "native_mate/handle.h"
+#include "ui/base/accelerators/accelerator.h"
+
+namespace atom {
+
+namespace api {
+
+class GlobalShortcut : public extensions::GlobalShortcutListener::Observer,
+                       public mate::Wrappable {
+ public:
+  static mate::Handle<GlobalShortcut> Create(v8::Isolate* isolate);
+
+ protected:
+  GlobalShortcut();
+  virtual ~GlobalShortcut();
+
+  // mate::Wrappable implementations:
+  virtual mate::ObjectTemplateBuilder GetObjectTemplateBuilder(
+      v8::Isolate* isolate) OVERRIDE;
+
+ private:
+  typedef std::map<ui::Accelerator, base::Closure> AcceleratorCallbackMap;
+
+  bool Register(const std::string& keycode, const base::Closure& callback);
+  bool IsRegistered(const std::string& keycode);
+  void Unregister(const std::string& keycode);
+  void UnregisterAll();
+
+  // GlobalShortcutListener::Observer implementation.
+  virtual void OnKeyPressed(const ui::Accelerator& accelerator) OVERRIDE;
+
+  AcceleratorCallbackMap accelerator_callback_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(GlobalShortcut);
+};
+
+}  // namespace api
+
+}  // namespace atom
+
+#endif  // ATOM_BROWSER_API_ATOM_API_GLOBAL_SHORTCUT_H_