Splits PipelineImpl into main and media thread components.

media/blink/webmediaplayer_impl.cc

Index: media/blink/webmediaplayer_impl.cc
diff --git a/media/blink/webmediaplayer_impl.cc b/media/blink/webmediaplayer_impl.cc
index 832433691bd68828415cd0e6ee98628d11754c88..defc865aba94329335913e1c44779577f35a530a 100644
--- a/media/blink/webmediaplayer_impl.cc
+++ b/media/blink/webmediaplayer_impl.cc
@@ -230,26 +230,15 @@ WebMediaPlayerImpl::WebMediaPlayerImpl(
 }
 
 WebMediaPlayerImpl::~WebMediaPlayerImpl() {
-  client_->setWebLayer(NULL);
-
   DCHECK(main_task_runner_->BelongsToCurrentThread());
 
+  suppress_destruction_errors_ = true;
+  client_->setWebLayer(NULL);
   if (delegate_) {
     delegate_->PlayerGone(delegate_id_);
     delegate_->RemoveObserver(delegate_id_);
   }
 
-  // Abort any pending IO so stopping the pipeline doesn't get blocked.
-  suppress_destruction_errors_ = true;
-  if (data_source_)
-    data_source_->Abort();
-  if (chunk_demuxer_) {
-    chunk_demuxer_->Shutdown();
-    chunk_demuxer_ = nullptr;
-  }
-
-  renderer_factory_.reset();
-
   // Pipeline must be stopped before it is destroyed.
   pipeline_.Stop();