Remove MediaStream renderer from the webapp.

remoting/webapp/base/html/main.css

 /* 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.
  */
 
 html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p,
 blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em,
 font, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, dl,
 dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody,
 tfoot, thead, tr, th, td, button {
@@ skipping 698 matching lines @@
   left: 0;
   width: 100%;
 }
 
 /* Override full-height class until connected, otherwise it takes up 100% of
  * the window height in addition to the home-screen UI. */
 body:not(.connected) #session-mode {
   height: auto;
 }
 
-/* video-container needs relative position so that mediasource-video-output can
- * be positioned relative to the parent with position:absolute. */
-#video-container {
-  position: relative;
-}
-
-/* mediasource-video-output is hidden by default. */
-#video-container video {
-  display: none;
-}
-
-/* Use absolute positioning for mediasource-video-output so that it's rendered
- * at the same position as the plugin. */
-#video-container.mediasource-rendering video {
-  display: block;
-  position: absolute;
-  left: 0;
-  top: 0;
-  box-shadow: 0 0 8px 0 black;
-}
-
-/*
- * With MediaSource-based rendering the plugin is transparent and is placed on
- * top of the <video> element so that it can still receive mouse events.
- *
- * TODO(sergeyu): This is temporary solution. Ideally mouse and keyboard events
- * should be captured on JS level and passed to the plugin.
- */
-#video-container.mediasource-rendering .client-plugin-container {
-  opacity: 0;
-}
-
 .mouse-cursor-overlay {
   position: absolute;
   pointer-events: none;
 }
 
 body.hangout-remote-desktop .home-screen {
   display: none;
 }