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 37891cb2bc672e2fc35321de022a5539728e50e7..099bc96ca6bbf1d7bca07983c48e9b67d94b8b81 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.cc
+++ b/content/browser/loader/resource_dispatcher_host_impl.cc
@@ -205,31 +205,6 @@ void RemoveDownloadFileFromChildSecurityPolicy(int child_id,
 #pragma warning(default: 4748)
 #endif
 
-net::RequestPriority DetermineRequestPriority(
-    const ResourceHostMsg_Request& request_data) {
-  switch (request_data.priority) {
-    case WebKit::WebURLRequest::PriorityVeryHigh:
-      return net::HIGHEST;
-
-    case WebKit::WebURLRequest::PriorityHigh:
-      return net::MEDIUM;
-
-    case WebKit::WebURLRequest::PriorityMedium:
-      return net::LOW;
-
-    case WebKit::WebURLRequest::PriorityLow:
-      return net::LOWEST;
-
-    case WebKit::WebURLRequest::PriorityVeryLow:
-      return net::IDLE;
-
-    case WebKit::WebURLRequest::PriorityUnresolved:
-    default:
-      NOTREACHED();
-      return net::LOW;
-  }
-}
-
 void OnSwapOutACKHelper(int render_process_id,
                         int render_view_id,
                         bool timed_out) {
@@ -939,8 +914,7 @@ void ResourceDispatcherHostImpl::BeginRequest(
   // transferred navigation case?
 
   request->set_load_flags(load_flags);
-
-  request->set_priority(DetermineRequestPriority(request_data));
+  request->set_priority(request_data.priority);
 
   // Resolve elements from request_body and prepare upload data.
   if (request_data.request_body) {
@@ -1049,11 +1023,12 @@ 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, 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;