Add getUserSelectedDevices to the USB extensions API.

chrome/browser/ui/cocoa/extensions/device_permissions_dialog_controller.mm

 // Copyright 2014 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.
 
 #import "chrome/browser/ui/cocoa/extensions/device_permissions_dialog_controller.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
+#include "chrome/browser/extensions/api/chrome_device_permissions_prompt.h"
 #import "chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_sheet.h"
 #import "chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_window.h"
 #import "chrome/browser/ui/cocoa/extensions/device_permissions_view_controller.h"
 #include "device/usb/usb_device.h"
 
 using extensions::DevicePermissionsPrompt;
 
-namespace {
-
-void ShowDevicePermissionsDialogImpl(
-    content::WebContents* web_contents,
-    DevicePermissionsPrompt::Delegate* delegate,
-    scoped_refptr<DevicePermissionsPrompt::Prompt> prompt) {
-  // These objects will delete themselves when the dialog closes.
-  new DevicePermissionsDialogController(web_contents, delegate, prompt);
-}
-
-}  // namespace
-
 DevicePermissionsDialogController::DevicePermissionsDialogController(
     content::WebContents* web_contents,
     DevicePermissionsPrompt::Delegate* delegate,
     scoped_refptr<DevicePermissionsPrompt::Prompt> prompt)
     : delegate_(delegate), prompt_(prompt) {
   view_controller_.reset(
       [[DevicePermissionsViewController alloc] initWithDelegate:this
                                                          prompt:prompt]);
 
   prompt_->SetObserver(this);
@@ skipping 25 matching lines @@
 
 void DevicePermissionsDialogController::OnConstrainedWindowClosed(
     ConstrainedWindowMac* window) {
   if (delegate_) {
     std::vector<scoped_refptr<device::UsbDevice>> empty;
     delegate_->OnUsbDevicesChosen(empty);
   }
   base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
 }
 
-// static
-DevicePermissionsPrompt::ShowDialogCallback
-DevicePermissionsPrompt::GetDefaultShowDialogCallback() {
-  return base::Bind(&ShowDevicePermissionsDialogImpl);
+void ChromeDevicePermissionsPrompt::ShowDialog() {
+  // These objects will delete themselves when the dialog closes.
+  new DevicePermissionsDialogController(web_contents(), delegate(), prompt());
 }