Get all the UsbConfigDescriptor for the device configuration

device/devices_app/usb/device_impl.cc

Index: device/devices_app/usb/device_impl.cc
diff --git a/device/devices_app/usb/device_impl.cc b/device/devices_app/usb/device_impl.cc
index e8b299b86b77f69da4f8992d90bc413cf13d89ab..213f1cfb79c761a45ee66d16fc936f0db61978f5 100644
--- a/device/devices_app/usb/device_impl.cc
+++ b/device/devices_app/usb/device_impl.cc
@@ -123,7 +123,7 @@ void DeviceImpl::GetDeviceInfo(const GetDeviceInfoCallback& callback) {
   // but GetConfiguration() is non-const so we do it here for now.
   DeviceInfoPtr info = DeviceInfo::From(*device_handle_->GetDevice());
   const UsbConfigDescriptor* config =
-      device_handle_->GetDevice()->GetConfiguration();
+      device_handle_->GetDevice()->GetActiveConfiguration();
   info->configurations = mojo::Array<ConfigurationInfoPtr>::New(0);

[Reilly Grant (use Gerrit), 2015/08/04 23:47:08]

Please update this method to fill info->configurations with the full set of
configurations instead of just the active configuration as it does now. You can
do this as a separate review if you'd like.

[juncai, 2015/08/05 15:42:17]

I will do this in another patch.

   if (config)
     info->configurations.push_back(ConfigurationInfo::From(*config));