[Chromoting] Implement DualBufferFrameConsumer

remoting/client/software_video_renderer.cc

Index: remoting/client/software_video_renderer.cc
diff --git a/remoting/client/software_video_renderer.cc b/remoting/client/software_video_renderer.cc
index 930087dcf9f985ec84d4a7f1a4da3110f5452ab3..52ff34611b5b2a7657dde36ef9d58e751bf6192b 100644
--- a/remoting/client/software_video_renderer.cc
+++ b/remoting/client/software_video_renderer.cc
@@ -51,13 +51,10 @@ SoftwareVideoRenderer::SoftwareVideoRenderer(protocol::FrameConsumer* consumer)
 }
 
 SoftwareVideoRenderer::SoftwareVideoRenderer(
-    scoped_refptr<base::SingleThreadTaskRunner> decode_task_runner,
-    protocol::FrameConsumer* consumer,
-    protocol::FrameStatsConsumer* stats_consumer)
-    : decode_task_runner_(decode_task_runner),
-      consumer_(consumer),
-      stats_consumer_(stats_consumer),
-      weak_factory_(this) {}
+    std::unique_ptr<protocol::FrameConsumer> consumer)
+    : SoftwareVideoRenderer(consumer.get()) {
+  owned_consumer_ = std::move(consumer);
+}
 
 SoftwareVideoRenderer::~SoftwareVideoRenderer() {
   if (decoder_)