Fix resize issues when using threaded compositing

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 6b869cf7435880f4ae15f3078895a403a067943b..0fc8a4de1d3365752bfbb10f8fb87e52569633e5 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -968,6 +968,30 @@ void RenderWidget::didDeactivateCompositor() {
     using_asynchronous_swapbuffers_ = false;
 }
 
+void RenderWidget::didCommitAndDrawCompositorFrame()

[jam, 2011/11/17 22:56:12]

nit: here and below, brace bracket on the previous line per the chrome style
guide

+{
+}
+
+void RenderWidget::didCompleteSwapBuffers()
+{
+  if (update_reply_pending())
+    return;
+
+  if (!next_paint_flags_ && !plugin_window_moves_.size())

[jbates, 2012/04/16 23:41:35]

This will blow up if someone adds new flags to ViewHostMsg_UpdateRect_Flags.

+    return;
+
+  ViewHostMsg_UpdateRect_Params params;
+  params.view_size = size_;
+  params.resizer_rect = resizer_rect_;
+  params.plugin_window_moves.swap(plugin_window_moves_);
+  params.flags = next_paint_flags_;
+  params.scroll_offset = GetScrollOffset();
+  update_reply_pending_ = true;
+
+  Send(new ViewHostMsg_UpdateRect(routing_id_, params));
+  next_paint_flags_ = 0;
+}
+
 void RenderWidget::scheduleComposite() {
   if (WebWidgetHandlesCompositorScheduling())
     webwidget_->composite(false);