Report video and network stats averaged over 1s, and create corresponding UMA metrics.

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 51782e05f476f4942a30408a7e52d0214cc0a80f..748c2bfa31bd850eec4d90b4b8e2836c56f55620 100644
--- a/remoting/client/software_video_renderer.cc
+++ b/remoting/client/software_video_renderer.cc
@@ -350,6 +350,9 @@ void SoftwareVideoRenderer::ProcessVideoPacket(scoped_ptr<VideoPacket> packet,
                                                 const base::Closure& done) {
   DCHECK(CalledOnValidThread());
 
+  // Record this received packet, even if it is empty.
+  stats_.video_packet_rate()->Record(1);
+
   // If the video packet is empty then drop it. Empty packets are used to
   // maintain activity on the network.
   if (!packet->has_data() || packet->data().size() == 0) {
@@ -357,7 +360,7 @@ void SoftwareVideoRenderer::ProcessVideoPacket(scoped_ptr<VideoPacket> packet,
     return;
   }
 
-  // Add one frame to the counter.
+  // Add one frame to the video frame rate counter.
   stats_.video_frame_rate()->Record(1);
 
   // Record other statistics received from host.