WeakPtr destruction order cleanup: media edition.

media/audio/alsa/alsa_output.cc

Index: media/audio/alsa/alsa_output.cc
diff --git a/media/audio/alsa/alsa_output.cc b/media/audio/alsa/alsa_output.cc
index 308bedc50965770b4d96bf081d397d92ba8f7949..690d738f19574c12a6d973ecd422c1a321cda465 100644
--- a/media/audio/alsa/alsa_output.cc
+++ b/media/audio/alsa/alsa_output.cc
@@ -153,11 +153,11 @@ AlsaPcmOutputStream::AlsaPcmOutputStream(const std::string& device_name,
       message_loop_(base::MessageLoop::current()),
       playback_handle_(NULL),
       frames_per_packet_(packet_size_ / bytes_per_frame_),
-      weak_factory_(this),
       state_(kCreated),
       volume_(1.0f),
       source_callback_(NULL),
-      audio_bus_(AudioBus::Create(params)) {
+      audio_bus_(AudioBus::Create(params)),
+      weak_factory_(this) {
   DCHECK(manager_->GetTaskRunner()->BelongsToCurrentThread());
   DCHECK_EQ(audio_bus_->frames() * bytes_per_frame_, packet_size_);