Add HD browser test to WebRTC suite.

chrome/test/data/webrtc/video_detector.js

 /**
  * Copyright (c) 2012 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 // This file requires the functions defined in test_functions.js.
 
 var gFingerprints = [];
 
@@ skipping 30 matching lines @@
     gFingerprints.push(fingerprint_(context, width, height));
     if (gFingerprints.length > NUM_FINGERPRINTS_TO_SAVE) {
       gFingerprints.shift();
     }
   }, 100);
 
   returnToTest('ok-started');
 }
 
 /**
+ * Verifies that the video stream connected to a video tag has the right width
+ * and height.
+ *
+ * @param {string} videoElementId The video element to analyze.
+ * @param {int}    width The expected video width.
+ * @param {int}    width The expected video height.
+ *
+ * @return {string} Returns 'ok' if passing (exception is thrown on failure).
+ */
+function verifyVideoStreamSize(videoElementId, expectedWidth, expectedHeight) {
+  var videoTag = document.getElementById(videoElementId);
+  console.log('videoTag' + videoTag);
+  if (videoTag.videoWidth == expectedWidth &&
+      videoTag.videoHeight == expectedHeight) {
+    returnToTest('ok-video-stream-size');
+  }
+  else {
+    throw failTest('Invalid video stream size: ' + videoTag.videoWidth +
+        'x' + videoTag.videoHeight + ' (expected: ' + expectedWidth + 'x' +
+        expectedHeight + ')');
+  }
+}
+
+/**
  * Checks if we have detected any video so far.
  *
  * @return {string} video-playing if we detected video, otherwise
  *                  video-not-playing.
  */
 function isVideoPlaying() {
   // Video is considered to be playing if at least one finger print has changed
   // since the oldest fingerprint. Even small blips in the pixel data will cause
   // this check to pass. We only check for rough equality though to account for
   // rounding errors.
@@ skipping 50 matching lines @@
 function fingerprint_(canvasContext, width, height) {
   var imageData = canvasContext.getImageData(0, 0, width, height);
   var pixels = imageData.data;
 
   var fingerprint = 0;
   for (var i = 0; i < pixels.length; i++) {
     fingerprint += pixels[i];
   }
   return fingerprint;
 }