Add a ResourceScheduler to ResourceDispatcherHost.

content/browser/loader/resource_dispatcher_host_impl.cc

Index: content/browser/loader/resource_dispatcher_host_impl.cc
diff --git a/content/browser/loader/resource_dispatcher_host_impl.cc b/content/browser/loader/resource_dispatcher_host_impl.cc
index fd945c744a5fe8c85659d748a10017c1eab5d4b0..d53f002f576096f8ecf0ac85ff8c7b395a79576e 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.cc
+++ b/content/browser/loader/resource_dispatcher_host_impl.cc
@@ -1052,11 +1052,12 @@ void ResourceDispatcherHostImpl::BeginRequest(
         new TransferNavigationResourceThrottle(request));
   }
 
-  if (!throttles.empty()) {
-    handler.reset(
-        new ThrottlingResourceHandler(handler.Pass(), child_id, request_id,
-                                      throttles.Pass()));
-  }
+  throttles.push_back(scheduler_.ScheduleRequest(child_id, route_id,

[darin (slow to review), 2013/01/14 22:03:30]

nit: might read slightly better as:

  throttles.push_back(
      scheduler_.ScheduleRequest(child_id, route_id, *request).release());

[James Simonsen, 2013/01/15 01:10:06]

Done.

+                                                 *request).release());
+
+  handler.reset(
+      new ThrottlingResourceHandler(handler.Pass(), child_id, request_id,
+                                    throttles.Pass()));
 
   if (deferred_loader.get()) {
     pending_loaders_[extra_info->GetGlobalRequestID()] = deferred_loader;