Chrome changes to support cached form submissions....

webkit/glue/resource_loader_bridge.h

 // Copyright (c) 2006-2008 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, which also provides a factory method Create
 // to instantiate this object.
 //
 // One of these objects will be created by WebKit for each request. WebKit
@@ skipping 182 matching lines @@
   // to the request body.  May only be used with HTTP(S) POST requests.
   void AppendFileToUpload(const std::wstring& file_path) {
     AppendFileRangeToUpload(file_path, 0, kuint64max);
   }
 
   // Call this method before calling Start() to append the contents of a file
   // to the request body.  May only be used with HTTP(S) POST requests.
   virtual void AppendFileRangeToUpload(const std::wstring& file_path,
                                        uint64 offset, uint64 length) = 0;
 
+  // Call this method before calling Start() to assign an upload identifier to
+  // this request.  This is used to enable caching of POST responses.  A value
+  // of 0 implies the unspecified identifier.
+  virtual void SetUploadIdentifier(int64 identifier) = 0;
+
   // Call this method to initiate the request.  If this method succeeds, then
   // the peer's methods will be called asynchronously to report various events.
   virtual bool Start(Peer* peer) = 0;
 
   // 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;
 
@@ skipping 14 matching lines @@
   // construction must go through Create()
   ResourceLoaderBridge();
 
  private:
   DISALLOW_EVIL_CONSTRUCTORS(ResourceLoaderBridge);
 };
 
 }  // namespace webkit_glue
 
 #endif  // RESOURCE_LOADER_BRIDGE_