net: Notify the http job and cache transaction about a filter

net/http/http_transaction.h

 // Copyright (c) 2011 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.
 
 #ifndef NET_HTTP_HTTP_TRANSACTION_H_
 #define NET_HTTP_HTTP_TRANSACTION_H_
 #pragma once
 
 #include "base/string16.h"
 #include "net/base/completion_callback.h"
@@ skipping 78 matching lines @@
   // NOTE: The transaction is not responsible for deleting the callback object.
   // If the operation is not completed immediately, the transaction must acquire
   // a reference to the provided buffer.
   //
   virtual int Read(IOBuffer* buf, int buf_len,
                    CompletionCallback* callback) = 0;
 
   // Stops further caching of this request by the HTTP cache, if there is any.
   virtual void StopCaching() = 0;
 
+  // Called to tell the transaction that we have successfully reached the end
+  // of the stream. This is equivalent to performing an extra Read() at the end
+  // that should return 0 bytes. This method should not be called if the
+  // transaction is busy processing a previous operation (like a pending Read).
+  virtual void DoneReading() = 0;
+
   // Returns the response info for this transaction or NULL if the response
   // info is not available.
   virtual const HttpResponseInfo* GetResponseInfo() const = 0;
 
   // Returns the load state for this transaction.
   virtual LoadState GetLoadState() const = 0;
 
   // Returns the upload progress in bytes.  If there is no upload data,
   // zero will be returned.  This does not include the request headers.
   virtual uint64 GetUploadProgress() const = 0;
 
   // SetSSLHostInfo sets a object which reads and writes public information
   // about an SSL server. It's used to implement Snap Start.
   // TODO(agl): remove this.
   virtual void SetSSLHostInfo(SSLHostInfo*) { };
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_TRANSACTION_H_