Revert 120111 - Defer render_widget draw until host window is available

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
===================================================================
--- content/renderer/render_widget.cc	(revision 120128)
+++ content/renderer/render_widget.cc	(working copy)
@@ -175,8 +175,6 @@
 
   host_window_ = parent_hwnd;
 
-  DoDeferredUpdate();
-
   Send(new ViewHostMsg_RenderViewReady(routing_id_));
 }
 
@@ -739,11 +737,6 @@
 
   if (!webwidget_)
     return;
-
-  if (!host_window_) {
-    TRACE_EVENT0("renderer", "EarlyOut_NoHostWindow");
-    return;
-  }
   if (update_reply_pending_) {
     TRACE_EVENT0("renderer", "EarlyOut_UpdateReplyPending");
     return;
@@ -762,9 +755,6 @@
     return;
   }
 
-  if (is_accelerated_compositing_active_)
-    using_asynchronous_swapbuffers_ = SupportsAsynchronousSwapBuffers();
-
   // Tracking of frame rate jitter
   base::TimeTicks frame_begin_ticks = base::TimeTicks::Now();
   AnimateIfNeeded();
@@ -1020,6 +1010,10 @@
   is_accelerated_compositing_active_ = true;
   Send(new ViewHostMsg_DidActivateAcceleratedCompositing(
       routing_id_, is_accelerated_compositing_active_));
+
+  // Note: asynchronous swapbuffer support currently only matters if
+  // compositing scheduling happens on the RenderWidget.
+  using_asynchronous_swapbuffers_ = SupportsAsynchronousSwapBuffers();
 }
 
 void RenderWidget::didDeactivateCompositor() {