WeakPtr destruction order cleanup: media edition.

media/filters/vpx_video_decoder.cc

Index: media/filters/vpx_video_decoder.cc
diff --git a/media/filters/vpx_video_decoder.cc b/media/filters/vpx_video_decoder.cc
index df314ec2c1e10dab43b8ff17a886b5f8ca71d620..a4c5d9617b008b525e9c5be194463b246b1f4792 100644
--- a/media/filters/vpx_video_decoder.cc
+++ b/media/filters/vpx_video_decoder.cc
@@ -204,11 +204,10 @@ void VpxVideoDecoder::MemoryPool::OnVideoFrameDestroyed(
 VpxVideoDecoder::VpxVideoDecoder(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner)
     : task_runner_(task_runner),
-      weak_factory_(this),
       state_(kUninitialized),
       vpx_codec_(NULL),
-      vpx_codec_alpha_(NULL) {
-}
+      vpx_codec_alpha_(NULL),
+      weak_factory_(this) {}
 
 VpxVideoDecoder::~VpxVideoDecoder() {
   DCHECK_EQ(kUninitialized, state_);