Add chooser permission UI code for Mac

chrome/browser/usb/usb_chooser_bubble_delegate.cc

Index: chrome/browser/usb/usb_chooser_bubble_delegate.cc
diff --git a/chrome/browser/usb/usb_chooser_bubble_delegate.cc b/chrome/browser/usb/usb_chooser_bubble_delegate.cc
index 5887773132a63cda714b319c3a2d662346c770ca..7411308a8e0ed99772c1fcec7baeb81441366f72 100644
--- a/chrome/browser/usb/usb_chooser_bubble_delegate.cc
+++ b/chrome/browser/usb/usb_chooser_bubble_delegate.cc
@@ -4,11 +4,6 @@
 
 #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_options.h"
 
 UsbChooserBubbleDelegate::UsbChooserBubbleDelegate(
@@ -16,25 +11,13 @@ UsbChooserBubbleDelegate::UsbChooserBubbleDelegate(
     mojo::Array<device::usb::DeviceFilterPtr> device_filters,
     content::RenderFrameHost* render_frame_host,
     const webusb::WebUsbPermissionBubble::GetPermissionCallback& callback)
-    : browser_(browser) {
-  DCHECK(browser_);
+    : ChooserBubbleDelegate(browser) {
   chooser_options_.reset(new UsbChooserOptions(device_filters.Pass(),
                                                render_frame_host, callback));
 }
 
 UsbChooserBubbleDelegate::~UsbChooserBubbleDelegate() {}
 
-scoped_ptr<BubbleUi> UsbChooserBubbleDelegate::BuildBubbleUi() {
-  scoped_ptr<BubbleUi> bubble_ui;
-// TODO(juncai): Add chooser bubble ui cocoa code for Mac.
-// Please refer to http://crbug.com/492204 for more information.
-#if !defined(OS_MACOSX)
-  bubble_ui.reset(
-      new ChooserBubbleUiView(browser_, chooser_options_.get(), this));
-#endif
-  return bubble_ui.Pass();
-}
-
 void UsbChooserBubbleDelegate::Select(int index) {
   chooser_options_->Select(index);
 }