Actually end a ZLib stream with a Z_FINISH marker.

runtime/bin/filter.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef BIN_FILTER_H_
 #define BIN_FILTER_H_
 
 #include "bin/builtin.h"
 #include "bin/utils.h"
 
 #include "../third_party/zlib/zlib.h"
 
 
 namespace dart {
 namespace bin {
 
 class Filter {
  public:
   virtual ~Filter() {}
 
   virtual bool Init() = 0;
 
   /**
    * On a succesfull call to Process, Process will take ownership of data. On
    * successive calls to either Processed or ~Filter, data will be freed with
    * a delete[] call.
    */
   virtual bool Process(uint8_t* data, intptr_t length) = 0;
-  virtual intptr_t Processed(uint8_t* buffer, intptr_t length, bool finish) = 0;
+  virtual intptr_t Processed(uint8_t* buffer,
+                             intptr_t length,
+                             bool finish,
+                             bool end) = 0;
 
   static Dart_Handle SetFilterPointerNativeField(Dart_Handle filter,
                                                  Filter* filter_pointer);
   static Dart_Handle GetFilterPointerNativeField(Dart_Handle filter,
                                                  Filter** filter_pointer);
 
   bool initialized() const { return initialized_; }
   void set_initialized(bool value) { initialized_ = value; }
   uint8_t* processed_buffer() { return processed_buffer_; }
   intptr_t processed_buffer_size() const { return kFilterBufferSize; }
@@ skipping 10 matching lines @@
 };
 
 class ZLibDeflateFilter : public Filter {
  public:
   ZLibDeflateFilter(bool gzip = false, int level = 6)
     : gzip_(gzip), level_(level), current_buffer_(NULL) {}
   virtual ~ZLibDeflateFilter();
 
   virtual bool Init();
   virtual bool Process(uint8_t* data, intptr_t length);
-  virtual intptr_t Processed(uint8_t* buffer, intptr_t length, bool finish);
+  virtual intptr_t Processed(uint8_t* buffer,
+                             intptr_t length,
+                             bool finish,
+                             bool end);
 
  private:
   const bool gzip_;
   const int level_;
   uint8_t* current_buffer_;
   z_stream stream_;
 
   DISALLOW_COPY_AND_ASSIGN(ZLibDeflateFilter);
 };
 
 class ZLibInflateFilter : public Filter {
  public:
   ZLibInflateFilter() : current_buffer_(NULL) {}
   virtual ~ZLibInflateFilter();
 
   virtual bool Init();
   virtual bool Process(uint8_t* data, intptr_t length);
-  virtual intptr_t Processed(uint8_t* buffer, intptr_t length, bool finish);
+  virtual intptr_t Processed(uint8_t* buffer,
+                             intptr_t length,
+                             bool finish,
+                             bool end);
 
  private:
   uint8_t* current_buffer_;
   z_stream stream_;
 
   DISALLOW_COPY_AND_ASSIGN(ZLibInflateFilter);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // BIN_FILTER_H_