[Video] Disable bg optimization if avg keyframe distance is >10s

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 85b54ec6a274af7867d7cff74ea3ec45a72dbea5..662f4f9769fc535126152b3a4c1f88d3594ed80e 100644
--- a/media/base/pipeline_impl.cc
+++ b/media/base/pipeline_impl.cc
@@ -637,6 +637,8 @@ void PipelineImpl::RendererWrapper::OnStatisticsUpdate(
   shared_state_.statistics.video_frames_dropped += stats.video_frames_dropped;
   shared_state_.statistics.audio_memory_usage += stats.audio_memory_usage;
   shared_state_.statistics.video_memory_usage += stats.video_memory_usage;
+  shared_state_.statistics.video_keyframe_distance_average =
+      stats.video_keyframe_distance_average;
 }
 
 void PipelineImpl::RendererWrapper::OnBufferingStateChange(