Move page/actions to internal/actions.

tools/telemetry/telemetry/page/actions/loop.js

-// Copyright 2013 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 performs actions on media elements.
-(function() {
-  function loopMedia(selector, loopCount) {
-    // Loops media playback `loopCount` times.
-    var mediaElements = window.__findMediaElements(selector);
-    for (var i = 0; i < mediaElements.length; i++) {
-      loop(mediaElements[i], loopCount);
-    }
-  }
-
-  function loop(element, loopCount) {
-    if (element instanceof HTMLMediaElement)
-      loopHTML5Element(element, loopCount);
-    else
-      throw new Error('Can not play non HTML5 media elements.');
-  }
-
-  function loopHTML5Element(element, loopCount) {
-    window.__registerHTML5ErrorEvents(element);
-    element['loop_completed'] = false;
-    var currentLoop = 0;
-    var onLoop = function(e) {
-      ++currentLoop;
-      if (currentLoop == loopCount) {
-        element.pause();
-        element.removeEventListener('seeked', onLoop);
-        element['loop_completed'] = true;
-        // Dispatch endLoopEvent to mark end of looping.
-        var endLoopEvent = document.createEvent('Event');
-        endLoopEvent.initEvent('endLoop', false, false);
-        element.dispatchEvent(endLoopEvent);
-      }
-    };
-
-    element.addEventListener('seeked', onLoop);
-    element.loop = true;
-
-    // Dispatch willLoopEvent to measure loop time.
-    var willLoopEvent = document.createEvent('Event');
-    willLoopEvent.initEvent('willLoop', false, false);
-    willLoopEvent.loopCount = loopCount;
-    element.dispatchEvent(willLoopEvent);
-    // Reset HTML5 player to start playback from beginning.
-    element.load();
-    element.play();
-  }
-
-  window.__loopMedia = loopMedia;
-})();