Lock to access |statistics_| in StateTransitionTask().

media/base/pipeline_impl.cc

Index: media/base/pipeline_impl.cc
diff --git a/media/base/pipeline_impl.cc b/media/base/pipeline_impl.cc
index e9b860243762dd0233743ed68f40e8dce3ad4b02..8289f7366b55fadd4f545464de4e742a043f8142 100644
--- a/media/base/pipeline_impl.cc
+++ b/media/base/pipeline_impl.cc
@@ -381,8 +381,11 @@ void PipelineImpl::StateTransitionTask(PipelineStatus status) {
 
     case kSuspended:
       renderer_.reset();
-      statistics_.audio_memory_usage = 0;
-      statistics_.video_memory_usage = 0;
+      {
+        base::AutoLock auto_lock(lock_);
+        statistics_.audio_memory_usage = 0;
+        statistics_.video_memory_usage = 0;
+      }
       base::ResetAndReturn(&suspend_cb_).Run(PIPELINE_OK);
       return;