Reland of Added VP8 simulcast tests. Fixed analyzer to correctly infer timestamps.

webrtc/video/video_send_stream.cc

Index: webrtc/video/video_send_stream.cc
diff --git a/webrtc/video/video_send_stream.cc b/webrtc/video/video_send_stream.cc
index 9b5c81b9f81b83ea84506f6d3be19a838f0bc93e..466b5c2f00ad0f7adb7ff6947456d9ef5632431d 100644
--- a/webrtc/video/video_send_stream.cc
+++ b/webrtc/video/video_send_stream.cc
@@ -1032,7 +1032,8 @@
   if (config_->post_encode_callback) {
     config_->post_encode_callback->EncodedFrameCallback(
         EncodedFrame(encoded_image._buffer, encoded_image._length,
-                     encoded_image._frameType));
+                     encoded_image._frameType, encoded_image._encodedWidth,
+                     encoded_image._encodedHeight, encoded_image._timeStamp));
   }
   {
     rtc::CritScope lock(&encoder_activity_crit_sect_);