Abort MSP::OnPrefetchDone() if just after MSP::Release(). Let seek and config change survive.

media/base/android/media_decoder_job.cc

Index: media/base/android/media_decoder_job.cc
diff --git a/media/base/android/media_decoder_job.cc b/media/base/android/media_decoder_job.cc
index cd8d04cfe3fdba4d6ccdf93ffa33dcff732b3e06..4558845f325f043a796408b0a341a2271a05199e 100644
--- a/media/base/android/media_decoder_job.cc
+++ b/media/base/android/media_decoder_job.cc
@@ -67,10 +67,12 @@ void MediaDecoderJob::Prefetch(const base::Closure& prefetch_cb) {
   DCHECK(decode_cb_.is_null());
 
   if (HasData()) {
+    DVLOG(1) << __FUNCTION__ << " : using previously received data";
     ui_loop_->PostTask(FROM_HERE, prefetch_cb);
     return;
   }
 
+  DVLOG(1) << __FUNCTION__ << " : requesting data";
   RequestData(prefetch_cb);
 }
 
@@ -134,6 +136,7 @@ void MediaDecoderJob::BeginPrerolling(
 
 void MediaDecoderJob::Release() {
   DCHECK(ui_loop_->BelongsToCurrentThread());
+  DVLOG(1) << __FUNCTION__;
 
   // If the decoder job is not waiting for data, and is still decoding, we
   // cannot delete the job immediately.
@@ -143,8 +146,10 @@ void MediaDecoderJob::Release() {
   on_data_received_cb_.Reset();
   decode_cb_.Reset();
 
-  if (destroy_pending_)
+  if (destroy_pending_) {
+    DVLOG(1) << __FUNCTION__ << " : delete is pending decode completion";
     return;
+  }
 
   delete this;
 }
@@ -372,6 +377,7 @@ void MediaDecoderJob::OnDecodeCompleted(
   DCHECK(ui_loop_->BelongsToCurrentThread());
 
   if (destroy_pending_) {
+    DVLOG(1) << __FUNCTION__ << " : completing pending deletion";
     delete this;
     return;
   }