WeakPtr destruction order cleanup: media edition.

media/filters/gpu_video_decoder.h

Index: media/filters/gpu_video_decoder.h
diff --git a/media/filters/gpu_video_decoder.h b/media/filters/gpu_video_decoder.h
index d46e1784dd8e92f20581adf2e9dea1ca9557e826..cb4174256b077a69636183381e61ffb0e9db9001 100644
--- a/media/filters/gpu_video_decoder.h
+++ b/media/filters/gpu_video_decoder.h
@@ -130,10 +130,6 @@ class MEDIA_EXPORT GpuVideoDecoder
 
   bool needs_bitstream_conversion_;
 
-  // Bound to factories_->GetMessageLoop().
-  base::WeakPtrFactory<GpuVideoDecoder> weak_factory_;
-  base::WeakPtr<GpuVideoDecoder> weak_this_;
-
   scoped_refptr<GpuVideoAcceleratorFactories> factories_;
 
   // Populated during Initialize() (on success) and unchanged until an error
@@ -188,6 +184,10 @@ class MEDIA_EXPORT GpuVideoDecoder
   // HasAvailableOutputFrames().
   int available_pictures_;
 
+  // Bound to factories_->GetMessageLoop().
+  // NOTE: Weak pointers must be invalidated before all other member variables.
+  base::WeakPtrFactory<GpuVideoDecoder> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(GpuVideoDecoder);
 };