Add a ResourceScheduler to ResourceDispatcherHost.

webkit/glue/resource_loader_bridge.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // The intent of this file is to provide a type-neutral abstraction between
 // Chrome and WebKit for resource loading. This pure-virtual interface is
 // implemented by the embedder.
 //
 // One of these objects will be created by WebKit for each request. WebKit
 // will own the pointer to the bridge, and will delete it when the request is
@@ skipping 12 matching lines @@
 #if defined(OS_POSIX)
 #include "base/file_descriptor_posix.h"
 #endif
 #include "base/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/platform_file.h"
 #include "base/time.h"
 #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"
 #include "webkit/glue/resource_type.h"
 #include "webkit/glue/webkit_glue_export.h"
 
 namespace net {
 class HttpResponseHeaders;
 }
 
@@ skipping 197 matching lines @@
     int load_flags;
 
     // Process id of the process making the request.
     int requestor_pid;
 
     // Indicates if the current request is the main frame load, a sub-frame
     // load, or a sub objects load.
     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;
 
     // Identifies what appcache host this request is associated with.
     int appcache_host_id;
 
     // Used to associated the bridge with a frame's network context.
     int routing_id;
 
@@ skipping 103 matching lines @@
   // Call this method to cancel a request that is in progress.  This method
   // causes the request to immediately transition into the 'done' state. The
   // OnCompletedRequest method will be called asynchronously; this assumes
   // the peer is still valid.
   virtual void Cancel() = 0;
 
   // Call this method to suspend or resume a load that is in progress.  This
   // 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
   // error occurs.  It could block the calling thread for a long time, so only
   // use this if you really need it!  There is also no way for the caller to
   // interrupt this method.  Errors are reported via the status field of the
   // response parameter.
   virtual void SyncLoad(SyncLoadResponse* response) = 0;
 
  protected:
   // Construction must go through
   // WebKitPlatformSupportImpl::CreateResourceLoader()
   // For HTTP(S) POST requests, the AppendDataToUpload and AppendFileToUpload
   // methods may be called to construct the body of the request.
   WEBKIT_GLUE_EXPORT ResourceLoaderBridge();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ResourceLoaderBridge);
 };
 
 }  // namespace webkit_glue
 
 #endif  // WEBKIT_GLUE_RESOURCE_LOADER_BRIDGE_H_