Adjust VideoRendererAlgorithm for |frame_dropping_disabled_|

media/filters/video_renderer_algorithm.cc

Index: media/filters/video_renderer_algorithm.cc
diff --git a/media/filters/video_renderer_algorithm.cc b/media/filters/video_renderer_algorithm.cc
index 71783cf8ca9d80ba76aa1c1e107dcee03e9a4c0f..38915ddf57e649a6775dfde25b0cb14bdb311cbb 100644
--- a/media/filters/video_renderer_algorithm.cc
+++ b/media/filters/video_renderer_algorithm.cc
@@ -685,6 +685,24 @@ void VideoRendererAlgorithm::UpdateEffectiveFramesQueued() {
     return;
   }
 
+  // Determine the lower bound of the number of effective queues first.
+  // Normally, this is 0.
+  size_t min_frames_queued = 0;
+
+  // If frame dropping is disabled, the lower bound is the number of frames
+  // that were not rendered yet.
+  if (frame_dropping_disabled_) {
+    min_frames_queued = std::count_if(
+        frame_queue_.cbegin(), frame_queue_.cend(),
+        [](const ReadyFrame& frame) { return frame.render_count == 0; });
+  }
+
+  // Next, see if can report more frames as queued.
+  effective_frames_queued_ =
+      std::max(min_frames_queued, CountEffectiveFramesQueued());
+}
+
+size_t VideoRendererAlgorithm::CountEffectiveFramesQueued() const {
   // If we don't have cadence, subtract off any frames which are before
   // the last rendered frame or are past their expected rendering time.
   if (!cadence_estimator_.has_cadence()) {
@@ -694,16 +712,13 @@ void VideoRendererAlgorithm::UpdateEffectiveFramesQueued() {
       if (frame.end_time.is_null() || frame.end_time > last_deadline_max_)
         break;
     }
-    effective_frames_queued_ = frame_queue_.size() - expired_frames;
-    return;
+    return frame_queue_.size() - expired_frames;
   }
 
   // Find the first usable frame to start counting from.
   const int start_index = FindBestFrameByCadence(nullptr);
-  if (start_index < 0) {
-    effective_frames_queued_ = 0;
-    return;
-  }
+  if (start_index < 0)
+    return 0;
 
   const base::TimeTicks minimum_start_time =
       last_deadline_max_ - max_acceptable_drift_;
@@ -715,8 +730,7 @@ void VideoRendererAlgorithm::UpdateEffectiveFramesQueued() {
       ++renderable_frame_count;
     }
   }
-
-  effective_frames_queued_ = renderable_frame_count;
+  return renderable_frame_count;
 }
 
 }  // namespace media