Usb backend refactor step 2: Separate Usb Device Handle and Usb Device (deprecate)

third_party/libusb/src/libusb/interrupt.c

Index: third_party/libusb/src/libusb/interrupt.c
diff --git a/third_party/libusb/src/libusb/interrupt.c b/third_party/libusb/src/libusb/interrupt.c
new file mode 100644
index 0000000000000000000000000000000000000000..f6912d70ff1ae9988557e07358fe575cb376631f
--- /dev/null
+++ b/third_party/libusb/src/libusb/interrupt.c
@@ -0,0 +1,11 @@
+// Copyright (c) 2013 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 "libusbi.h"
+
+int API_EXPORTED libusb_interrupt_handle_event(struct libusb_context* ctx) {
+  unsigned char dummy = 1;
+  USBI_GET_CONTEXT(ctx);
+  return usbi_write(ctx->ctrl_pipe[1], &dummy, sizeof(dummy));
+}