Add configuration and interface permission checks to DeviceImpl.

device/usb/usb_device_handle_impl.cc

Index: device/usb/usb_device_handle_impl.cc
diff --git a/device/usb/usb_device_handle_impl.cc b/device/usb/usb_device_handle_impl.cc
index 1ae6816983ad9c7586cc308d7f77ec189ffbdf65..ffe5e0f3353d2a4f832ed5390077c80d225689a7 100644
--- a/device/usb/usb_device_handle_impl.cc
+++ b/device/usb/usb_device_handle_impl.cc
@@ -683,6 +683,17 @@ void UsbDeviceHandleImpl::GenericTransfer(UsbEndpointDirection direction,
   }
 }
 
+bool UsbDeviceHandleImpl::FindInterfaceByEndpoint(uint8_t endpoint_address,
+                                                  uint8_t* interface_number) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  const auto endpoint_it = endpoint_map_.find(endpoint_address);
+  if (endpoint_it != endpoint_map_.end()) {
+    *interface_number = endpoint_it->second.interface_number;
+    return true;
+  }
+  return false;
+}
+
 UsbDeviceHandleImpl::UsbDeviceHandleImpl(
     scoped_refptr<UsbContext> context,
     scoped_refptr<UsbDeviceImpl> device,
@@ -827,9 +838,10 @@ void UsbDeviceHandleImpl::RefreshEndpointMap() {
 
 scoped_refptr<UsbDeviceHandleImpl::InterfaceClaimer>
 UsbDeviceHandleImpl::GetClaimedInterfaceForEndpoint(uint8_t endpoint) {
-  if (ContainsKey(endpoint_map_, endpoint))
-    return claimed_interfaces_[endpoint_map_[endpoint].interface_number];
-  return NULL;
+  const auto endpoint_it = endpoint_map_.find(endpoint);
+  if (endpoint_it != endpoint_map_.end())
+    return claimed_interfaces_[endpoint_it->second.interface_number];
+  return nullptr;
 }
 
 void UsbDeviceHandleImpl::ControlTransferInternal(