Have media content and chrome browser tests load data from media/test/data

chrome/test/data/media/eme_player_js/fps_observer.js

-// Copyright 2014 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.
-
-// FPSObserver observes a <video> and reports decoded FPS, dropped FPS, and
-// total dropped frames during the video playback.
-var FPSObserver = new function() {
-  this.video_ = null;
-  this.decodedFrames_ = 0;
-  this.droppedFrames_ = 0;
-  this.startTime_ = 0;
-  this.intID_ = null;
-}
-
-FPSObserver.observe = function(video) {
-  this.video_ = video;
-  var observer = this;
-  this.video_.addEventListener('playing', function() {
-    observer.onVideoPlaying();
-  });
-
-  this.video_.addEventListener('error', function() {
-    observer.endTest();
-  });
-
-  this.video_.addEventListener('ended', function() {
-    observer.endTest();
-  });
-};
-
-FPSObserver.onVideoPlaying = function() {
-  this.decodedFrames_ = 0;
-  this.droppedFrames_ = 0;
-  this.startTime_ = window.performance.now();
-  this.endTest(true);
-  var observer = this;
-  this.intID_ = window.setInterval(function() {
-      observer.calculateStats();}, 1000);
-};
-
-FPSObserver.calculateStats = function() {
-  if (this.video_.readyState <= HTMLMediaElement.HAVE_CURRENT_DATA ||
-      this.video_.paused || this.video_.ended)
-    return;
-  var currentTime = window.performance.now();
-  var deltaTime = (currentTime - this.startTime_) / 1000;
-  this.startTime_ = currentTime;
-
-  // Calculate decoded frames per sec.
-  var fps = (this.video_.webkitDecodedFrameCount - this.decodedFrames_) /
-             deltaTime;
-  this.decodedFrames_ = this.video_.webkitDecodedFrameCount;
-  fps = fps.toFixed(2);
-  decodedFPSElement.innerHTML = fps;
-
-  // Calculate dropped frames per sec.
-  fps = (this.video_.webkitDroppedFrameCount - this.droppedFrames_) / deltaTime;
-  this.droppedFrames_ = this.video_.webkitDroppedFrameCount;
-  fps = fps.toFixed(2);
-  droppedFPSElement.innerHTML = fps;
-
-  droppedFramesElement.innerHTML = this.droppedFrames_;
-};
-
-FPSObserver.endTest = function() {
-  window.clearInterval(this.intID_);
-};