Calc USB scancodes for key events (linux only for now)

webkit/plugins/ppapi/usb_scan_code_conversion.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 "webkit/plugins/ppapi/usb_scan_code_conversion.h"
+
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
+
+using WebKit::WebKeyboardEvent;
+
+namespace webkit {
+namespace ppapi {
+
+// TODO(garykac): Implement for Windows and Mac.
+#if !defined(OS_LINUX)
+
+uint32_t UsbScanCodeForKeyboardEvent(const WebKeyboardEvent& key_event) {
+  return 0;
+}
+
+#endif
+
+}  // namespace ppapi
+}  // namespace webkit