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 "chrome/browser/ui/cocoa/website_settings/chooser_bubble_ui_cocoa.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));
+  chooser_choices_->set_observer(this);
+}
+
+UsbChooserBubbleDelegate::~UsbChooserBubbleDelegate() {}
+
+scoped_ptr<BubbleUi> UsbChooserBubbleDelegate::BuildBubbleUi() {
+#if defined(OS_MACOSX)
+  scoped_ptr<ChooserBubbleUiCocoa> bubble_ui(new ChooserBubbleUiCocoa());
+  chooser_bubble_ui_cocoa_ = bubble_ui.get();
+#else
+  scoped_ptr<ChooserBubbleUiView> bubble_ui(
+      new ChooserBubbleUiView(browser_, chooser_choices_.get(), this));
+  chooser_bubble_ui_view_ = bubble_ui.get();
+#endif
+  return bubble_ui.Pass();
+}
+
+void UsbChooserBubbleDelegate::Select(int index) {
+  chooser_choices_->Select(index);
+#if defined(OS_MACOSX)

[Reilly Grant (use Gerrit), 2015/10/29 01:11:32]

I don't see the purpose of having two different fields and ifdefs here.

[juncai, 2015/10/31 04:15:36]

Done.

+  chooser_bubble_ui_cocoa_->Close();
+#else
+  chooser_bubble_ui_view_->Close();
+#endif
+}
+
+void UsbChooserBubbleDelegate::Cancel() {
+#if defined(OS_MACOSX)
+  chooser_bubble_ui_cocoa_->Close();
+#else
+  chooser_bubble_ui_view_->Close();
+#endif
+}
+
+void UsbChooserBubbleDelegate::OnChoicesChanged() {
+#if defined(OS_MACOSX)
+  chooser_bubble_ui_cocoa_->Update();
+#else
+  chooser_bubble_ui_view_->Update();
+#endif
+}