clang/win: Fix warnings to prepare for building without -Wno-reorder.

media/audio/win/wavein_input_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/audio/win/wavein_input_win.h"
 
 #pragma comment(lib, "winmm.lib")
 
 #include "base/logging.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/win/audio_manager_win.h"
 #include "media/audio/win/device_enumeration_win.h"
 #include "media/base/audio_bus.h"
 
 namespace media {
 
 // Our sound buffers are allocated once and kept in a linked list using the
 // the WAVEHDR::dwUser variable. The last buffer points to the first buffer.
 static WAVEHDR* GetNextBuffer(WAVEHDR* current) {
   return reinterpret_cast<WAVEHDR*>(current->dwUser);
 }
 
 PCMWaveInAudioInputStream::PCMWaveInAudioInputStream(
     AudioManagerWin* manager,
     const AudioParameters& params,
     int num_buffers,
     const std::string& device_id)
     : state_(kStateEmpty),
       manager_(manager),
+      callback_(NULL),
+      num_buffers_(num_buffers),
+      channels_(params.channels()),
       device_id_(device_id),
       wavein_(NULL),
-      callback_(NULL),
-      num_buffers_(num_buffers),
       buffer_(NULL),
-      channels_(params.channels()),
       audio_bus_(media::AudioBus::Create(params)) {
   DCHECK_GT(num_buffers_, 0);
   format_.wFormatTag = WAVE_FORMAT_PCM;
   format_.nChannels = params.channels() > 2 ? 2 : params.channels();
   format_.nSamplesPerSec = params.sample_rate();
   format_.wBitsPerSample = params.bits_per_sample();
   format_.cbSize = 0;
   format_.nBlockAlign = (format_.nChannels * format_.wBitsPerSample) / 8;
   format_.nAvgBytesPerSec = format_.nBlockAlign * format_.nSamplesPerSec;
   buffer_size_ = params.frames_per_buffer() * format_.nBlockAlign;
@@ skipping 271 matching lines @@
       ::SetEvent(obj->stopped_event_.Get());
     }
   } else if (msg == WIM_CLOSE) {
     // Intentionaly no-op for now.
   } else if (msg == WIM_OPEN) {
     // Intentionaly no-op for now.
   }
 }
 
 }  // namespace media