Unit test for WebMediaPlayerMS

content/renderer/media/webmediaplayer_ms_compositor.cc

Index: content/renderer/media/webmediaplayer_ms_compositor.cc
diff --git a/content/renderer/media/webmediaplayer_ms_compositor.cc b/content/renderer/media/webmediaplayer_ms_compositor.cc
index 6b8f546c848308ff718baa4757b8de5d9cec730c..171e38340536dc15be36316f27d2e238cbd55fd2 100644
--- a/content/renderer/media/webmediaplayer_ms_compositor.cc
+++ b/content/renderer/media/webmediaplayer_ms_compositor.cc
@@ -106,6 +106,26 @@ WebMediaPlayerMSCompositor::WebMediaPlayerMSCompositor(
   serial_ = (hash_value << 1) | (remote_video ? 1 : 0);
 }
 
+WebMediaPlayerMSCompositor::WebMediaPlayerMSCompositor(
+    const scoped_refptr<base::SingleThreadTaskRunner>& compositor_task_runner,
+    const bool algorithm_enabled)
+    : compositor_task_runner_(compositor_task_runner),
+      video_frame_provider_client_(nullptr),
+      current_frame_used_by_compositor_(false),
+      last_render_length_(base::TimeDelta::FromSecondsD(1.0 / 60.0)),
+      total_frame_count_(0),
+      dropped_frame_count_(0),
+      stopped_(true) {
+  if (algorithm_enabled) {
+    base::AutoLock auto_lock(current_frame_lock_);
+    rendering_frame_buffer_.reset(new media::VideoRendererAlgorithm(
+        base::Bind(&WebMediaPlayerMSCompositor::MapTimestampsToRenderTimeTicks,
+                   base::Unretained(this))));
+  }
+
+  serial_ = algorithm_enabled ? 1 : 0;
+}
+
 WebMediaPlayerMSCompositor::~WebMediaPlayerMSCompositor() {
   DCHECK(compositor_task_runner_->BelongsToCurrentThread());
   if (video_frame_provider_client_)