Add a ResourceScheduler to ResourceDispatcherHost.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index bb8bd794ca92a222fa1154413a8a84f51b7bded9..deff67ee0cd9c88caf73ef6ceab56cd4e4b5b56c 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -5609,6 +5609,7 @@ void RenderViewImpl::DidFlushPaint() {
     Time now = Time::Now();
     if (document_state->first_paint_time().is_null()) {
       document_state->set_first_paint_time(now);
+      Send(new ViewHostMsg_DidFirstPaint(routing_id()));

[darin (slow to review), 2012/12/14 22:16:28]

did you consider just watching for the first ViewHostMsg_UpdateRect message
after ViewHostMsg_FrameNavigate?  seems a bit unfortunate to add more IPCs when
there is already a way to observe what you want to observe.

[James Simonsen, 2012/12/15 02:58:57]

Yeah, I did. You talked me out of it. :)

Let's see if your argument works again. Basically, you said the one point in
RenderViewImpl where we record the first paint histogram is the authority on
first paint. We know it to be correct regardless of whether we're using GPU or
software. So, it's best to key off of that.

     }
     if (document_state->first_paint_after_load_time().is_null() &&
         !document_state->finish_load_time().is_null()) {