[Media, Video] Update WMPI when the pipeline gets a new average keyframe distance.

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 ef8ac158a57c0837399ef7f2626e816135cd8e07..26f9dce0135e5884da417997aacc98ed7aa758dc 100644
--- a/media/base/pipeline_impl.cc
+++ b/media/base/pipeline_impl.cc
@@ -648,10 +648,19 @@ void PipelineImpl::RendererWrapper::OnStatisticsUpdate(
   shared_state_.statistics.audio_memory_usage += stats.audio_memory_usage;
   shared_state_.statistics.video_memory_usage += stats.video_memory_usage;
 
+  base::TimeDelta old_average =
+      shared_state_.statistics.video_keyframe_distance_average;
   if (stats.video_keyframe_distance_average != kNoTimestamp) {
     shared_state_.statistics.video_keyframe_distance_average =
         stats.video_keyframe_distance_average;
   }
+
+  if (shared_state_.statistics.video_keyframe_distance_average != old_average) {
+    main_task_runner_->PostTask(
+        FROM_HERE,
+        base::Bind(&PipelineImpl::OnVideoAverageKeyframeDistanceUpdate,
+                   weak_pipeline_));
+  }
 }
 
 void PipelineImpl::RendererWrapper::OnBufferingStateChange(
@@ -1324,6 +1333,15 @@ void PipelineImpl::OnVideoOpacityChange(bool opaque) {
   client_->OnVideoOpacityChange(opaque);
 }
 
+void PipelineImpl::OnVideoAverageKeyframeDistanceUpdate() {
+  DVLOG(2) << __func__;
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(IsRunning());
+
+  DCHECK(client_);
+  client_->OnVideoAverageKeyframeDistanceUpdate();
+}
+
 void PipelineImpl::OnSeekDone() {
   DVLOG(3) << __func__;
   DCHECK(thread_checker_.CalledOnValidThread());