chore: move the view APIs to their own directory (#14722)

* chore: move the view APIs to their own directory

* move view api cpp files

atom/browser/api/views/atom_api_button.h

@@ -0,0 +1,38 @@
+// Copyright (c) 2018 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_BROWSER_API_VIEWS_ATOM_API_BUTTON_H_
+#define ATOM_BROWSER_API_VIEWS_ATOM_API_BUTTON_H_
+
+#include "atom/browser/api/atom_api_view.h"
+#include "native_mate/handle.h"
+#include "ui/views/controls/button/button.h"
+
+namespace atom {
+
+namespace api {
+
+class Button : public View, public views::ButtonListener {
+ public:
+  static mate::WrappableBase* New(mate::Arguments* args);
+
+  static void BuildPrototype(v8::Isolate* isolate,
+                             v8::Local<v8::FunctionTemplate> prototype);
+
+ protected:
+  explicit Button(views::Button* view);
+  ~Button() override;
+
+  // views::ButtonListener:
+  void ButtonPressed(views::Button* sender, const ui::Event& event) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(Button);
+};
+
+}  // namespace api
+
+}  // namespace atom
+
+#endif  // ATOM_BROWSER_API_VIEWS_ATOM_API_BUTTON_H_