Add screen capture constraints, video tag resize and removed auto video resize

chrome/test/data/webrtc/manual/peerconnection.js

Index: chrome/test/data/webrtc/manual/peerconnection.js
diff --git a/chrome/test/data/webrtc/manual/peerconnection.js b/chrome/test/data/webrtc/manual/peerconnection.js
index 5c27fb4303c6d06d0d179263ce93bcfe7ad4b582..4575a7aadd9d90fa334f547fd4af8ed4f748e1a6 100644
--- a/chrome/test/data/webrtc/manual/peerconnection.js
+++ b/chrome/test/data/webrtc/manual/peerconnection.js
@@ -123,9 +123,14 @@ function forceOpusChanged() {
  */
 function updateGetUserMediaConstraints() {
   var constraints = {
-     audio: $('audio').checked,
-     video: $('video').checked
+    audio: $('audio').checked,
+    video: $('video').checked
   };
+  if ($('screencapture').checked)
+    var constraints = {
+      audio: $('audio').checked = false,

[kjellander_chromium, 2013/04/08 14:19:52]

I don't think we should alter the $('audio').checked attribute at all, even if
it's not supported in Chrome (unless the spec says so).

Please modify the error messages displayed when invalid constraints combinations
are attempted (possibly try to help the user by stating which combinations are
currently not supported).

[jansson, 2013/04/10 12:11:48]

Done.

+      video: {mandatory: {chromeMediaSource: 'screen'}}
+    };
   $('getusermedia-constraints').value =
       JSON.stringify(constraints, null, ' ');
 }
@@ -166,6 +171,8 @@ window.onload = function() {
   doNotAutoAddLocalStreamWhenCalled();
   hookupDataChannelCallbacks_();
   hookupDtmfSenderCallback_();
+  _displayVideoSize($('local-view'));
+  _displayVideoSize($('remote-view'));
 };
 
 /**