Add chrome side webusb permission UI code

chrome/browser/usb/web_usb_permission_bubble.h

+// Copyright 2015 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_USB_WEB_USB_PERMISSION_BUBBLE_H_
+#define CHROME_BROWSER_USB_WEB_USB_PERMISSION_BUBBLE_H_
+
+#include <vector>
+
+#include "base/macros.h"
+#include "components/bubble/bubble_reference.h"
+#include "components/webusb/public/interfaces/webusb_permission_bubble.mojom.h"
+#include "mojo/common/weak_binding_set.h"
+#include "mojo/public/cpp/bindings/array.h"
+#include "mojo/public/cpp/bindings/interface_request.h"
+
+namespace content {
+class RenderFrameHost;
+}
+
+namespace device {
+class UsbDevice;
+}
+
+// Implementation of the public webusb::WebUsbPermissionBubble interface.
+// This interface can be used by a webpage to request permission from user
+// to access a certain device.
+class ChromeWebUsbPermissionBubble : public webusb::WebUsbPermissionBubble {
+ public:
+  explicit ChromeWebUsbPermissionBubble(
+      content::RenderFrameHost* render_frame_host);
+
+  ~ChromeWebUsbPermissionBubble() override;
+
+  // webusb::WebUsbPermissionBubble:
+  void GetPermission(mojo::Array<device::usb::DeviceFilterPtr> device_filters,
+                     const GetPermissionCallback& callback) override;
+  void Bind(
+      mojo::InterfaceRequest<webusb::WebUsbPermissionBubble> request) override;
+
+ private:
+  content::RenderFrameHost* const render_frame_host_;
+  mojo::WeakBindingSet<webusb::WebUsbPermissionBubble> bindings_;
+  std::vector<BubbleReference> bubbles_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeWebUsbPermissionBubble);
+};
+
+#endif  // CHROME_BROWSER_USB_WEB_USB_PERMISSION_BUBBLE_H_