WebUSB bindings part 3

Source/modules/webusb/USBDevice.h

Index: Source/modules/webusb/USBDevice.h
diff --git a/Source/modules/webusb/USBDevice.h b/Source/modules/webusb/USBDevice.h
index 95f9c283a0e9a2dfef6bea022d7d635d6de734da..8738ea3097e25899e903d3678b36a35162f985fa 100644
--- a/Source/modules/webusb/USBDevice.h
+++ b/Source/modules/webusb/USBDevice.h
@@ -12,6 +12,8 @@
 
 namespace blink {
 
+class USBConfiguration;
+
 class USBDevice
     : public GarbageCollectedFinalized<USBDevice>
     , public ScriptWrappable {
@@ -48,6 +50,7 @@ public:
     String manufacturerName() const { return info().manufacturerName; }
     String productName() const { return info().productName; }
     String serialNumber() const { return info().serialNumber; }
+    HeapVector<Member<USBConfiguration>> configurations() const;
 
     DEFINE_INLINE_TRACE() { }