Resize video output to match input dimensions.

chrome/test/data/webrtc/video_extraction.js

Index: chrome/test/data/webrtc/video_extraction.js
diff --git a/chrome/test/data/webrtc/video_extraction.js b/chrome/test/data/webrtc/video_extraction.js
index 0436673f52837dcf85b3d96f8b678192b83f4bf2..bbfee0ef9f98dddd757cbb269bc20cafb05018b2 100644
--- a/chrome/test/data/webrtc/video_extraction.js
+++ b/chrome/test/data/webrtc/video_extraction.js
@@ -52,8 +52,13 @@ var gDoneFrameCapturing = false;
 function startFrameCapture(videoTag, frameRate, duration) {
   gFrameCaptureInterval = 1000 / frameRate;
   gCaptureDuration = 1000 * duration;
-  var width = videoTag.videoWidth;
-  var height = videoTag.videoHeight;
+  // Resize output element to input dimensions to not compare VGA output to HD

[phoglund_chromium, 2016/04/22 13:58:30]

That doesn't explain the background. What about:

// The WebRTC code is free to start in VGA, so make sure that the output
// video tag scales up to whatever the input size is (otherwise the video
// quality comparison will go poorly.

Also move the comment to above videoTag.width = width;

[pbos, 2016/04/22 14:04:42]

Done.

+  // input.
+  inputElement = document.getElementById("local-view");
+  var width = inputElement.videoWidth;
+  var height = inputElement.videoHeight;
+  videoTag.width = width;
+  videoTag.height = height;
 
   if (width == 0 || height == 0) {
     throw failTest('Trying to capture from ' + videoTag.id +