Convert DeviceManagerDelegate to PermissionProvider mojo interface.

chrome/browser/usb/web_usb_permission_provider.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_PROVIDER_H_
+#define CHROME_BROWSER_USB_WEB_USB_PERMISSION_PROVIDER_H_
+
+#include "device/devices_app/usb/public/interfaces/permission_provider.mojom.h"
+#include "third_party/mojo/src/mojo/public/cpp/bindings/array.h"
+#include "third_party/mojo/src/mojo/public/cpp/bindings/interface_request.h"
+#include "third_party/mojo/src/mojo/public/cpp/bindings/strong_binding.h"
+
+namespace content {
+class RenderFrameHost;
+}
+
+namespace chrome {

[Lei Zhang, 2015/09/05 00:24:20]

no namespace chrome

[Reilly Grant (use Gerrit), 2015/09/05 00:56:25]

Done.

+
+class WebUSBPermissionProvider : public device::usb::PermissionProvider {
+ public:
+  static void Create(

[Lei Zhang, 2015/09/05 00:24:20]

Why have Create() and a public ctor?

[Reilly Grant (use Gerrit), 2015/09/05 00:56:25]

The AddService method called in chrome_content_browser_client.cc requires a
closure and closures don't work over constructors.

[Lei Zhang, 2015/09/05 01:18:14]

Can you make the ctor private with a comment to use Create(), so all creation
happens in the same way via Create() ?

+      content::RenderFrameHost* render_frame_host,
+      mojo::InterfaceRequest<device::usb::PermissionProvider> request);
+
+  WebUSBPermissionProvider(content::RenderFrameHost* render_frame_host,
+                           mojo::InterfaceRequest<PermissionProvider> request);
+  ~WebUSBPermissionProvider() override;
+
+ private:
+  // device::usb::PermissionProvider implementation.
+  void HasDevicePermission(
+      mojo::Array<mojo::String> requested_guids,
+      const HasDevicePermissionCallback& callback) override;
+
+  mojo::StrongBinding<PermissionProvider> binding_;
+  content::RenderFrameHost* const render_frame_host_;
+};
+
+}  // namespace chrome
+
+#endif  // CHROME_BROWSER_USB_WEB_USB_PERMISSION_PROVIDER_H_