Move page/actions to internal/actions.

tools/telemetry/telemetry/internal/actions/media_action.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 provides common functions for media actions.
 window.__findMediaElements = function(selector) {
   // Returns elements matching the selector, otherwise returns the first video
   // or audio tag element that can be found.
   // If selector == 'all', returns all media elements.
@@ skipping 39 matching lines @@
 window.__registerHTML5EventCompleted = function(element, event_name) {
   // Logs |even_name| on element when completed.
   var logEventHappened = function(e) {
     element[e.type + '_completed'] = true;
     element.removeEventListener(event_name, logEventHappened);
   }
   element.addEventListener(event_name, logEventHappened);
 };
 
 window.__error = null;