Implement bluetooth chooser for Chrome Apps on Mac

chrome/browser/ui/cocoa/extensions/chooser_dialog_cocoa.h

+// Copyright 2016 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_UI_COCOA_EXTENSIONS_CHOOSER_DIALOG_COCOA_H_
+#define CHROME_BROWSER_UI_COCOA_EXTENSIONS_CHOOSER_DIALOG_COCOA_H_
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/mac/scoped_nsobject.h"
+#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_mac.h"
+#include "components/chooser_controller/chooser_controller.h"
+
+namespace content {
+class WebContents;
+}
+
+@class ChooserDialogCocoaController;
+
+// Displays a chooser dialog as a modal sheet constrained
+// to the window/tab displaying the given web contents.
+class ChooserDialogCocoa : public ConstrainedWindowMacDelegate,
+                           public ChooserController::Observer {
+ public:
+  ChooserDialogCocoa(content::WebContents* web_contents,
+                     ChooserController* chooser_controller);
+  ~ChooserDialogCocoa() override;
+
+  // ConstrainedWindowMacDelegate:
+  void OnConstrainedWindowClosed(ConstrainedWindowMac* window) override;
+
+  // ChooserController::Observer:
+  void OnOptionsInitialized() override;
+  void OnOptionAdded(size_t index) override;
+  void OnOptionRemoved(size_t index) override;
+
+  // Create and show the modal dialog.
+  void ShowDialog();
+
+  // Call this to close the chooser dialog.
+  void Dismissed();
+
+  content::WebContents* web_contents() const { return web_contents_; }
+
+ private:
+  friend class ChooserDialogCocoaControllerTest;
+  base::scoped_nsobject<ChooserDialogCocoaController>
+      chooser_dialog_cocoa_controller_ = nullptr;
+  std::unique_ptr<ConstrainedWindowMac> constrained_window_ = nullptr;
+  content::WebContents* web_contents_;     // Weak.
+  ChooserController* chooser_controller_;  // Weak.
+};
+
+#endif  // CHROME_BROWSER_UI_COCOA_EXTENSIONS_CHOOSER_DIALOG_COCOA_H_