Added help text to PeerConnection test page.

chrome/test/data/webrtc/manual/peerconnection.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.
  */
 
 // The *Here functions are called from peerconnection.html and will make calls
 // into our underlying javascript library with the values from the page.
 
 function getUserMediaFromHere() {
@@ skipping 62 matching lines @@
 }
 
 function showServerHelp() {
   alert('You need to build and run a peerconnection_server on some '
     + 'suitable machine. To build it in chrome, just run make/ninja '
     + 'peerconnection_server. Otherwise, read in https://code.google'
     + '.com/searchframe#xSWYf0NTG_Q/trunk/peerconnection/README&q=REA'
     + 'DME%20package:webrtc%5C.googlecode%5C.com.');
 }
 
+function toggleHelp() {
+  var help = document.getElementById('help');
+  if (help.style.display == 'none')
+    help.style.display = 'inline';
+  else
+    help.style.display = 'none';
+}
+
 function clearLog() {
   document.getElementById('messages').innerHTML = '';
   document.getElementById('debug').innerHTML = '';
 }
 
 window.onload = function() {
   replaceReturnCallback(print_);
   replaceDebugCallback(debug_);
   doNotAutoAddLocalStreamWhenCalled();
 }
@@ skipping 18 matching lines @@
 
   console.log(message);
   document.getElementById('messages').innerHTML += message + '<br>';
 }
 
 /** @private */
 function debug_(message) {
   console.log(message);
   document.getElementById('debug').innerHTML += message + '<br>';
 }