--- .//src/3rdparty/chromium/media/midi/midi_manager_mac.cc.orig	2015-10-12 21:36:43.000000000 -0700
+++ .//src/3rdparty/chromium/media/midi/midi_manager_mac.cc	2015-11-11 09:31:28.000000000 -0700
@@ -17,10 +17,6 @@
 using base::SysCFStringRefToUTF8;
 using std::string;
 
-// NB: System MIDI types are pointer types in 32-bit and integer types in
-// 64-bit. Therefore, the initialization is the simplest one that satisfies both
-// (if possible).
-
 namespace media {
 
 namespace {
@@ -206,11 +202,7 @@
   // This method is called on a separate high-priority thread owned by CoreMIDI.
 
   MidiManagerMac* manager = static_cast<MidiManagerMac*>(read_proc_refcon);
-#if __LP64__
   MIDIEndpointRef source = reinterpret_cast<uintptr_t>(src_conn_refcon);
-#else
-  MIDIEndpointRef source = static_cast<MIDIEndpointRef>(src_conn_refcon);
-#endif
 
   // Dispatch to class method.
   manager->ReadMidi(source, packet_list);