Web MIDI: Add a run-time flag in blink

Source/WebKit/chromium/src/WebRuntimeFeatures.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 552 matching lines @@
 void WebRuntimeFeatures::enableExperimentalWebSocket(bool enable)
 {
     RuntimeEnabledFeatures::setExperimentalWebSocketEnabled(enable);
 }
 
 bool WebRuntimeFeatures::isExperimentalWebSocketEnabled()
 {
     return RuntimeEnabledFeatures::experimentalWebSocketEnabled();
 }
 
+void WebRuntimeFeatures::enableWebMIDI(bool enable)
+{
+    return RuntimeEnabledFeatures::setRequestMIDIAccessEnabled(enable);

[tkent, 2013/04/21 01:44:27]

The flag names are inconsistent; 'WebMIDI' and 'requestMIDIAccess'.
We had better use a consistent name.

+}
+
+bool WebRuntimeFeatures::isWebMIDIEnabled()
+{
+    return RuntimeEnabledFeatures::requestMIDIAccessEnabled();
+}
+
 } // namespace WebKit