Revert r21117 as it caused reliability failures....

chrome/renderer/render_view.cc

Index: chrome/renderer/render_view.cc
===================================================================
--- chrome/renderer/render_view.cc	(revision 21215)
+++ chrome/renderer/render_view.cc	(working copy)
@@ -2813,6 +2813,14 @@
       template_html, &error_strings, "t");
 }
 
+MessageLoop* RenderView::GetMessageLoopForIO() {
+  // Assume that we have only one RenderThread in the process and the owner loop
+  // of RenderThread is an IO message loop.
+  if (RenderThread::current())
+    return RenderThread::current()->owner_loop();
+  return NULL;
+}
+
 void RenderView::OnMoveOrResizeStarted() {
   if (webview())
     webview()->HideAutofillPopup();