Add a ResourceScheduler to ResourceDispatcherHost.

webkit/glue/resource_loader_bridge.h

Index: webkit/glue/resource_loader_bridge.h
diff --git a/webkit/glue/resource_loader_bridge.h b/webkit/glue/resource_loader_bridge.h
index 840c802b0fb9deac96cf24bda976367be849a527..9a36b89b5f903cdfd01eef14a64506390a808195 100644
--- a/webkit/glue/resource_loader_bridge.h
+++ b/webkit/glue/resource_loader_bridge.h
@@ -30,6 +30,7 @@
 #include "base/values.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/host_port_pair.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request_status.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebReferrerPolicy.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebURLRequest.h"
@@ -247,7 +248,7 @@ class ResourceLoaderBridge {
     ResourceType::Type request_type;
 
     // Indicates the priority of this request, as determined by WebKit.
-    WebKit::WebURLRequest::Priority priority;
+    net::RequestPriority priority;
 
     // Used for plugin to browser requests.
     uint32 request_context;
@@ -371,6 +372,11 @@ class ResourceLoaderBridge {
   // method may only be called after a successful call to the Start method.
   virtual void SetDefersLoading(bool value) = 0;
 
+  // Call this method when the priority of the requested resource changes after
+  // Start() has been called.  This method may only be called after a successful
+  // call to the Start method.
+  virtual void DidChangePriority(net::RequestPriority new_priority) = 0;
+
   // Call this method to load the resource synchronously (i.e., in one shot).
   // This is an alternative to the Start method.  Be warned that this method
   // will block the calling thread until the resource is fully downloaded or an