Defer socket setup until initialization and on document ready.

Code at the top level of a module should be related to definition only. Things that execute code should be inside of initialization methods. All evidence suggests that the binding to `window.onload` was arbitrary, and that this can be done as soon as the document is ready with no ill-effects.

static/js/collab_client.js

@@ -20,11 +20,6 @@
  * limitations under the License.
  */
 
-$(window).bind("load", function()
-{
-  getCollabClient.windowLoaded = true;
-});
-
 var chat = require('/chat').chat;
 
 // Dependency fill on init. This exists for `pad.socket` only.
@@ -268,19 +263,6 @@ function getCollabClient(ace2editor, serverVars, initialUserInfo, options, _pad)
     }*/
   }
 
-  function setUpSocketWhenWindowLoaded()
-  {
-    if (getCollabClient.windowLoaded)
-    {
-      setUpSocket();
-    }
-    else
-    {
-      setTimeout(setUpSocketWhenWindowLoaded, 200);
-    }
-  }
-  setTimeout(setUpSocketWhenWindowLoaded, 0);
-
   var hiccupCount = 0;
 
   function handleCometHiccup(params)
@@ -654,8 +636,7 @@ function getCollabClient(ace2editor, serverVars, initialUserInfo, options, _pad)
     }, 0);
   }
 
-  var self;
-  return (self = {
+  var self = {
     setOnUserJoin: function(cb)
     {
       callbacks.onUserJoin = cb;
@@ -698,7 +679,10 @@ function getCollabClient(ace2editor, serverVars, initialUserInfo, options, _pad)
     callWhenNotCommitting: callWhenNotCommitting,
     addHistoricalAuthors: tellAceAboutHistoricalAuthors,
     setChannelState: setChannelState
-  });
+  };
+
+  $(document).ready(setUpSocket);
+  return self;
 }
 
 function selectElementContents(elem)