Re-land 16025005 with fix for statics perf issue

Re-land 16025005 with tiny fix for statics perf issue

16025005 had review from: palmer@chromium.org, piman@chromium.org, scherkus@chromium.org

BUG=163795
TBR=scherkus@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=208003

[Chris Rogers, 2013-06-22 03:58:10]

only difference from 16025005 is to avoid #include <iostream>
in midi_port_info.cc which caused statics perf issue

[Chris Rogers, 2013-06-22 04:03:10]

Committed patchset #1 manually as r208003.

[Avi (use Gerrit), 2013-06-24 22:23:40]

I am getting build errors on my Mac:

../../media/midi/midi_manager_mac.cc:26:20: error: implicit conversion of NULL
constant to 'MIDIClientRef' (aka 'unsigned int') [-Werror,-Wnull-conversion]
    : midi_client_(NULL),
                  ~^~~~
                   0
../../media/midi/midi_manager_mac.cc:27:23: error: implicit conversion of NULL
constant to 'MIDIPortRef' (aka 'unsigned int') [-Werror,-Wnull-conversion]
      coremidi_input_(NULL),
                     ~^~~~
                      0
../../media/midi/midi_manager_mac.cc:28:24: error: implicit conversion of NULL
constant to 'MIDIPortRef' (aka 'unsigned int') [-Werror,-Wnull-conversion]
      coremidi_output_(NULL),
                      ~^~~~
                       0
../../media/midi/midi_manager_mac.cc:37:18: error: implicit conversion of NULL
constant to 'MIDIClientRef' (aka 'unsigned int') [-Werror,-Wnull-conversion]
  midi_client_ = NULL;
               ~ ^~~~
                 0
../../media/midi/midi_manager_mac.cc:47:21: error: implicit conversion of NULL
constant to 'MIDIPortRef' (aka 'unsigned int') [-Werror,-Wnull-conversion]
  coremidi_input_ = NULL;
                  ~ ^~~~
                    0
../../media/midi/midi_manager_mac.cc:86:5: error: no matching function for call
to 'MIDIPortConnectSource'
    MIDIPortConnectSource(coremidi_input_, src, src);
    ^~~~~~~~~~~~~~~~~~~~~
/Applications/Xcode5-DP.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks/CoreMIDI.framework/Headers/MIDIServices.h:1289:1:
note: candidate function not viable: no known conversion from 'MIDIEndpointRef'
(aka 'unsigned int') to 'void *' for 3rd argument; take the address of the
argument with &
MIDIPortConnectSource(  MIDIPortRef             port, 
^
../../media/midi/midi_manager_mac.cc:113:28: error: static_cast from 'void *' to
'MIDIEndpointRef' (aka 'unsigned int') is not allowed
  MIDIEndpointRef source = static_cast<MIDIEndpointRef>(src_conn_refcon);
                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~