Add chrome side webusb permission UI code

chrome/browser/usb/usb_chooser_bubble_delegate.cc

+// 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.
+
+#include "chrome/browser/usb/usb_chooser_bubble_delegate.h"
+
+#if defined(OS_MACOSX)
+#include "components/bubble/bubble_ui.h"
+#else
+#include "chrome/browser/ui/views/website_settings/chooser_bubble_ui_view.h"
+#endif
+#include "chrome/browser/usb/usb_chooser_choices.h"
+
+UsbChooserBubbleDelegate::UsbChooserBubbleDelegate(
+    Browser* browser,
+    mojo::Array<device::usb::DeviceFilterPtr> device_filters,
+    content::RenderFrameHost* render_frame_host,
+    const webusb::WebUsbPermissionBubble::GetPermissionCallback& callback)
+    : browser_(browser) {
+  DCHECK(browser_);
+  chooser_choices_.reset(new UsbChooserChoices(device_filters.Pass(),
+                                               render_frame_host, callback));
+}
+
+UsbChooserBubbleDelegate::~UsbChooserBubbleDelegate() {}
+
+scoped_ptr<BubbleUi> UsbChooserBubbleDelegate::BuildBubbleUi() {
+#if defined(OS_MACOSX)
+  scoped_ptr<BubbleUi> bubble_ui;
+#else
+  scoped_ptr<ChooserBubbleUiView> bubble_ui(
+      new ChooserBubbleUiView(browser_, chooser_choices_.get(), this));
+  chooser_bubble_ui_view_ = bubble_ui.get();

[Reilly Grant (use Gerrit), 2015/11/12 21:44:36]

Since ChooserBubbleUiView inherits from BubbleUi and BubbleUi has a Close()
method do we need a chooser_bubble_ui_view_ member here?

[juncai, 2015/11/14 01:54:36]

Done.

+#endif
+  return bubble_ui.Pass();
+}
+
+void UsbChooserBubbleDelegate::Select(int index) {
+  chooser_choices_->Select(index);
+#if !defined(OS_MACOSX)
+  chooser_bubble_ui_view_->Close();
+#endif
+}
+
+void UsbChooserBubbleDelegate::Cancel() {
+#if !defined(OS_MACOSX)
+  chooser_bubble_ui_view_->Close();
+#endif
+}