Fix remaining WeakPtrFactory ordering problems

content/renderer/media/remote_media_stream_impl.cc

 // Copyright (c) 2013 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 "content/renderer/media/remote_media_stream_impl.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 334 matching lines @@
   DCHECK(main_thread_->BelongsToCurrentThread());
   if (media_stream_)
     media_stream_->OnChanged(audio_tracks.Pass(), video_tracks.Pass());
 }
 
 // Called on the signaling thread.
 RemoteMediaStreamImpl::RemoteMediaStreamImpl(
     const scoped_refptr<base::SingleThreadTaskRunner>& main_thread,
     webrtc::MediaStreamInterface* webrtc_stream)
     : signaling_thread_(base::ThreadTaskRunnerHandle::Get()),
-      weak_factory_(this),
-      observer_(new RemoteMediaStreamImpl::Observer(weak_factory_.GetWeakPtr(),
-                main_thread, webrtc_stream)) {
+      weak_factory_(this) {
+  observer_ = new RemoteMediaStreamImpl::Observer(
+      weak_factory_.GetWeakPtr(), main_thread, webrtc_stream);
   CreateAdaptersForTracks(webrtc_stream->GetAudioTracks(),
       &audio_track_observers_, main_thread);
   CreateAdaptersForTracks(webrtc_stream->GetVideoTracks(),
       &video_track_observers_, main_thread);
 
   main_thread->PostTask(FROM_HERE,
       base::Bind(&RemoteMediaStreamImpl::Observer::InitializeOnMainThread,
           observer_, webrtc_stream->label()));
 }
 
@@ skipping 74 matching lines @@
   // Unregister all the audio track observers that were not used.
   // We need to do this before destruction since the observers can't unregister
   // from within the dtor due to a race.
   for (auto& track : *audio_tracks.get()) {
     if (track.get())
       track->Unregister();
   }
 }
 
 }  // namespace content