Pass WebKit priority changes and parsing messages up to the browser process.

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 353 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(
+      WebKit::WebURLRequest::Priority 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_