Web MIDI: Add a run-time flag in blink

Source/WebKit/chromium/src/WebRuntimeFeatures.cpp

Index: Source/WebKit/chromium/src/WebRuntimeFeatures.cpp
diff --git a/Source/WebKit/chromium/src/WebRuntimeFeatures.cpp b/Source/WebKit/chromium/src/WebRuntimeFeatures.cpp
index 6e016bb11495f86d54cd9ad70efd3526d1ca727c..544505941418f07c951720bdeda73b706ad3e2f1 100644
--- a/Source/WebKit/chromium/src/WebRuntimeFeatures.cpp
+++ b/Source/WebKit/chromium/src/WebRuntimeFeatures.cpp
@@ -570,4 +570,14 @@ 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