Add a ResourceScheduler to ResourceDispatcherHost.

content/browser/renderer_host/resource_dispatcher_host_impl.h

Index: content/browser/renderer_host/resource_dispatcher_host_impl.h
diff --git a/content/browser/renderer_host/resource_dispatcher_host_impl.h b/content/browser/renderer_host/resource_dispatcher_host_impl.h
index a3c134f45d6f1ec0d1f278cd8f5293cc1107be49..b2d6cd42db893cea3eeb8cdabc50d3c4942b0ae6 100644
--- a/content/browser/renderer_host/resource_dispatcher_host_impl.h
+++ b/content/browser/renderer_host/resource_dispatcher_host_impl.h
@@ -21,11 +21,13 @@
 #include "base/gtest_prod_util.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
 #include "base/time.h"
 #include "base/timer.h"
 #include "content/browser/download/download_resource_handler.h"
 #include "content/browser/renderer_host/resource_loader.h"
 #include "content/browser/renderer_host/resource_loader_delegate.h"
+#include "content/browser/renderer_host/resource_scheduler.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/child_process_data.h"
 #include "content/public/browser/notification_types.h"
@@ -199,6 +201,10 @@ class CONTENT_EXPORT ResourceDispatcherHostImpl
     return delegate_;
   }
 
+  ResourceScheduler* scheduler() {
+    return &resource_scheduler_;
+  }
+
   // Must be called after the ResourceRequestInfo has been created
   // and associated with the request.
   scoped_ptr<ResourceHandler> CreateResourceHandlerForDownload(
@@ -261,7 +267,7 @@ class CONTENT_EXPORT ResourceDispatcherHostImpl
                             scoped_ptr<ResourceHandler> handler);
 
   void StartLoading(ResourceRequestInfoImpl* info,
-                    const linked_ptr<ResourceLoader>& loader);
+                    scoped_ptr<ResourceLoader> loader);
 
   // Updates the "cost" of outstanding requests for |child_id|.
   // The "cost" approximates how many bytes are consumed by all the in-memory
@@ -275,13 +281,12 @@ class CONTENT_EXPORT ResourceDispatcherHostImpl
   // Estimate how much heap space |request| will consume to run.
   static int CalculateApproximateMemoryCost(net::URLRequest* request);
 
-  // The list of all requests that we have pending. This list is not really
+  // The list of all requests that we have scheduled. This list is not really
   // optimized, and assumes that we have relatively few requests pending at once
   // since some operations require brute-force searching of the list.
   //
-  // It may be enhanced in the future to provide some kind of prioritization
-  // mechanism. We should also consider a hashtable or binary tree if it turns
-  // out we have a lot of things here.
+  // We should also consider a hashtable or binary tree if it turns out we have
+  // a lot of things here.
   typedef std::map<GlobalRequestID, linked_ptr<ResourceLoader> > LoaderMap;
 
   // Deletes the pending request identified by the iterator passed in.
@@ -377,7 +382,7 @@ class CONTENT_EXPORT ResourceDispatcherHostImpl
   // True if the resource dispatcher host has been shut down.
   bool is_shutdown_;
 
-  typedef std::vector<linked_ptr<ResourceLoader> > BlockedLoadersList;
+  typedef ScopedVector<ResourceLoader> BlockedLoadersList;
   typedef std::pair<int, int> ProcessRouteIDs;
   typedef std::map<ProcessRouteIDs, BlockedLoadersList*> BlockedLoadersMap;
   BlockedLoadersMap blocked_loaders_map_;
@@ -413,6 +418,8 @@ class CONTENT_EXPORT ResourceDispatcherHostImpl
   // shutdown.
   std::set<const ResourceContext*> active_resource_contexts_;
 
+  ResourceScheduler resource_scheduler_;
+
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcherHostImpl);
 };