Change DrainableIOBuffer to IBuffer and int* in FilterData() arguments

net/filter/filter_source_stream.h

 // Copyright 2016 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_FILTER_FILTER_SOURCE_STREAM_H_
 #define NET_FILTER_FILTER_SOURCE_STREAM_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 48 matching lines @@
 
   // Helper method used as a callback argument passed to |upstream_->Read()|.
   void OnIOComplete(int result);
 
   // Subclasses should implement this method to filter data from
   // |input_buffer| and write to |output_buffer|.
   // This method must complete synchronously (i.e. It cannot return
   // ERR_IO_PENDING). If an unrecoverable error occurred, this should return
   // ERR_CONTENT_DECODING_FAILED or a more specific error code.
   //
-  // FilterData() will be repeatedly invoked with the same |input_buffer| until
-  // FilterData() returns 0 or an error. If FilterData() returns 0,
-  // |input_buffer| must be fully drained. Upstream EOF is reached when
-  // FilterData() is called with |upstream_eof_reached| = true.
+  // If FilterData() returns 0, *|consumed_bytes| must be equal to
+  // |input_buffer_size|. Upstream EOF is reached when FilterData() is called
+  // with |upstream_eof_reached| = true.
   // TODO(xunjieli): consider allowing asynchronous response via callback
   // to support off-thread decompression.
   virtual int FilterData(IOBuffer* output_buffer,
                          int output_buffer_size,
-                         DrainableIOBuffer* input_buffer,
+                         IOBuffer* input_buffer,
+                         int input_buffer_size,
+                         int* consumed_bytes,
                          bool upstream_eof_reached) = 0;
 
   // Returns a string representation of the type of this FilterSourceStream.
   // This is for UMA logging.
   virtual std::string GetTypeAsString() const = 0;
 
   // Returns whether |this| still needs more input data from |upstream_|.
   // By default, |this| will continue reading until |upstream_| returns an error
   // or EOF. Subclass can override this to return false to skip reading all the
   // input from |upstream_|.
@@ skipping 21 matching lines @@
 
   // Reading from |upstream_| has returned 0 byte or an error code.
   bool upstream_end_reached_;
 
   DISALLOW_COPY_AND_ASSIGN(FilterSourceStream);
 };
 
 }  // namespace net
 
 #endif  // NET_FILTER_FILTER_SOURCE_STREAM_H_