Add configuration and interface permission checks to DeviceImpl.

device/usb/usb_device.h

Index: device/usb/usb_device.h
diff --git a/device/usb/usb_device.h b/device/usb/usb_device.h
index 64fa6810f44cbf98c87ec8d0dc45fa95ce79c8e0..beb78036e57d92f9df47939df0ca58de760cc580 100644
--- a/device/usb/usb_device.h
+++ b/device/usb/usb_device.h
@@ -44,6 +44,9 @@ class UsbDevice : public base::RefCountedThreadSafe<UsbDevice> {
     return webusb_allowed_origins_.get();
   }
   const GURL& webusb_landing_page() const { return webusb_landing_page_; }
+  const std::vector<UsbConfigDescriptor>& configurations() const {
+    return configurations_;
+  }
 
   // On ChromeOS the permission_broker service is used to change the ownership
   // of USB device nodes so that Chrome can open them. On other platforms these
@@ -61,11 +64,6 @@ class UsbDevice : public base::RefCountedThreadSafe<UsbDevice> {
   // if the device is unconfigured.
   virtual const UsbConfigDescriptor* GetActiveConfiguration() = 0;
 
-  // Gets all of the device's UsbConfigDescriptors.
-  const std::vector<UsbConfigDescriptor>& configurations() const {
-    return configurations_;
-  }
-
  protected:
   UsbDevice(uint16_t vendor_id,
             uint16_t product_id,