Add chrome side webusb permission UI code

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
new file mode 100644
index 0000000000000000000000000000000000000000..be536adbbe4b00ab1e6ea863b7462b2fa3314b8b
--- /dev/null
+++ b/chrome/browser/usb/usb_chooser_bubble_delegate.cc
@@ -0,0 +1,40 @@
+// 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_options.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_options_.reset(new UsbChooserOptions(device_filters.Pass(),
+                                               render_frame_host, callback));
+}
+
+UsbChooserBubbleDelegate::~UsbChooserBubbleDelegate() {}
+
+scoped_ptr<BubbleUi> UsbChooserBubbleDelegate::BuildBubbleUi() {
+  scoped_ptr<BubbleUi> bubble_ui;

[felt, 2015/12/03 01:19:19]

this seems like an odd pattern. why is this being initialized for non-mac here,
but not for mac? (separate CL?)

[felt, 2015/12/03 01:21:17]

i now realize the answer is yes, a separate CL. can you please add a TODO with
the crbug here?

[juncai, 2015/12/03 18:33:59]

Done.

[juncai, 2015/12/03 18:33:59]

Yes, it is a separate CL which depends on this CL.
https://codereview.chromium.org/1473393003/

+#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);
+}
+
+void UsbChooserBubbleDelegate::Cancel() {}