Fix race condition in media Pipeline::GetMediaTime() after seeking.

media/base/pipeline_impl.h

Index: media/base/pipeline_impl.h
diff --git a/media/base/pipeline_impl.h b/media/base/pipeline_impl.h
index 624e3e71ccb87a2d383629a51ba1e3e1cd3f6f93..e7e1985ac3e10debc507f52bf3924a5b8e3ae565 100644
--- a/media/base/pipeline_impl.h
+++ b/media/base/pipeline_impl.h
@@ -173,6 +173,11 @@ class MEDIA_EXPORT PipelineImpl : public Pipeline {
   // reported to JavaScript from going backwards in time.
   mutable base::TimeDelta last_media_time_;
 
+  // Set by Seek(), used in place of asking the renderer for current media time
+  // while a seek is pending. Renderer's time cannot be trusted until the seek
+  // has completed.
+  base::TimeDelta pending_seek_time_;

[sandersd (OOO until July 31), 2017/01/04 21:10:23]

Nit: rename to |seek_time_| to match WMPI.

[chcunningham, 2017/01/04 21:15:47]

Done.

+
   base::ThreadChecker thread_checker_;
   base::WeakPtrFactory<PipelineImpl> weak_factory_;