WeakPtr destruction order cleanup: media edition.

media/filters/gpu_video_decoder.cc

Index: media/filters/gpu_video_decoder.cc
diff --git a/media/filters/gpu_video_decoder.cc b/media/filters/gpu_video_decoder.cc
index 54845214bb138195a69ba075b5582318230d2f2f..449cb1e779c3d0a85edd8dd492ff2d7bd06630e3 100644
--- a/media/filters/gpu_video_decoder.cc
+++ b/media/filters/gpu_video_decoder.cc
@@ -60,14 +60,14 @@ GpuVideoDecoder::GpuVideoDecoder(
     const scoped_refptr<GpuVideoAcceleratorFactories>& factories,
     const scoped_refptr<MediaLog>& media_log)
     : needs_bitstream_conversion_(false),
-      weak_factory_(this),
       factories_(factories),
       state_(kNormal),
       media_log_(media_log),
       decoder_texture_target_(0),
       next_picture_buffer_id_(0),
       next_bitstream_buffer_id_(0),
-      available_pictures_(0) {
+      available_pictures_(0),
+      weak_factory_(this) {
   DCHECK(factories_.get());
 }