media: Change auto to not deduce raw pointers.

media/midi/midi_manager_win.cc

Index: media/midi/midi_manager_win.cc
diff --git a/media/midi/midi_manager_win.cc b/media/midi/midi_manager_win.cc
index 610aa4f22eb484c2c0c263c5d2be90e15e6fbfb8..ebf4139813a62fedf942cb1d8c458aa37fecb4f0 100644
--- a/media/midi/midi_manager_win.cc
+++ b/media/midi/midi_manager_win.cc
@@ -445,7 +445,7 @@ class MidiServiceWinImpl : public MidiServiceWin,
           input_devices.push_back(it.first);
       }
       {
-        for (const auto handle : input_devices) {
+        for (auto* handle : input_devices) {
           MMRESULT result = midiInClose(handle);
           if (result == MIDIERR_STILLPLAYING) {
             result = midiInReset(handle);
@@ -466,7 +466,7 @@ class MidiServiceWinImpl : public MidiServiceWin,
           output_devices.push_back(it.first);
       }
       {
-        for (const auto handle : output_devices) {
+        for (auto* handle : output_devices) {
           MMRESULT result = midiOutClose(handle);
           if (result == MIDIERR_STILLPLAYING) {
             result = midiOutReset(handle);