Web MIDI: remove old platform API

Source/core/platform/midi/MIDIAccessor.cpp

Index: Source/core/platform/midi/MIDIAccessor.cpp
diff --git a/Source/core/platform/midi/MIDIAccessor.cpp b/Source/core/platform/midi/MIDIAccessor.cpp
index 8c0ad70264101caec8785f34160b76ed8061279f..306e355d35f6893ea00156c72b10720916403f3e 100644
--- a/Source/core/platform/midi/MIDIAccessor.cpp
+++ b/Source/core/platform/midi/MIDIAccessor.cpp
@@ -58,8 +58,7 @@ MIDIAccessor::MIDIAccessor(MIDIAccessorClient* client)
 
 void MIDIAccessor::startSession()
 {
-    // FIXME: Use new API once embedder side implement the new API.
-    m_accessor->requestAccess(false);
+    m_accessor->startSession();
 }
 
 void MIDIAccessor::sendMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStamp)
@@ -82,16 +81,6 @@ void MIDIAccessor::didStartSession()
     m_client->didStartSession();
 }
 
-void MIDIAccessor::didAllowAccess()
-{
-    m_client->didStartSession();
-}
-
-void MIDIAccessor::didBlockAccess()
-{
-    m_client->didStartSession();
-}
-
 void MIDIAccessor::didReceiveMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStamp)
 {
     m_client->didReceiveMIDIData(portIndex, data, length, timeStamp);