Web MIDI: prepare to pass a security origin from blink to browser

content/renderer/media/renderer_webmidiaccessor_impl.cc

Index: content/renderer/media/renderer_webmidiaccessor_impl.cc
diff --git a/content/renderer/media/renderer_webmidiaccessor_impl.cc b/content/renderer/media/renderer_webmidiaccessor_impl.cc
index 0a8b68f6d3b53c119398b0e985ce5f005fa5f50a..4655b34eab00200f2cc55fd3a7e00773c3ea9417 100644
--- a/content/renderer/media/renderer_webmidiaccessor_impl.cc
+++ b/content/renderer/media/renderer_webmidiaccessor_impl.cc
@@ -21,7 +21,12 @@ RendererWebMIDIAccessorImpl::~RendererWebMIDIAccessorImpl() {
 }
 
 void RendererWebMIDIAccessorImpl::requestAccess(bool access) {
-  midi_message_filter()->RequestAccess(client_, access ? 1 : 0);
+  midi_message_filter()->RequestAccess(std::string(), client_, access ? 1 : 0);
+}
+
+void RendererWebMIDIAccessorImpl::requestAccess(const WebKit::WebString& origin,
+                                                bool access) {
+  midi_message_filter()->RequestAccess(origin.utf8(), client_, access ? 1 : 0);
 }
 
 void RendererWebMIDIAccessorImpl::sendMIDIData(