Experimental USB API

chrome/renderer/extensions/experimental.usb_custom_bindings.cc

+// Copyright (c) 2012 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 "chrome/renderer/extensions/experimental.usb_custom_bindings.h"
+
+#include "base/logging.h"
+#include "v8/include/v8.h"
+
+namespace {
+
+v8::Handle<v8::Value> GetNextUsbEventId(const v8::Arguments &arguments) {
+  static int next_event_id = 1;
+  return v8::Integer::New(next_event_id++);

[asargent_no_longer_on_chrome, 2012/04/26 21:21:45]

I notice this is essentially the same as the socket code's id generation. FYI,
I've filed crbug.com/25237 to add some common infrastructure so this isn't
needed.

+}
+
+}  // namespace
+
+namespace extensions {
+
+ExperimentalUsbCustomBindings::ExperimentalUsbCustomBindings()
+    : ChromeV8Extension(NULL) {
+  RouteStaticFunction("GetNextUsbEventId", &GetNextUsbEventId);
+}
+
+}  // namespace extensions