Fix Zlib filters to correctly emit the last chunks of data.

runtime/bin/filter.cc

 // 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.
 
 #include "bin/dartutils.h"
 #include "bin/filter.h"
 #include "bin/io_buffer.h"
 
 #include "include/dart_api.h"
 
@@ skipping 260 matching lines @@
   return true;
 }
 
 
 intptr_t ZLibInflateFilter::Processed(uint8_t* buffer,
                                       intptr_t length,
                                       bool flush) {
   stream_.avail_out = length;
   stream_.next_out = buffer;
   switch (inflate(&stream_, flush ? Z_SYNC_FLUSH : Z_NO_FLUSH)) {
+    case Z_STREAM_END:
+    case Z_BUF_ERROR:
     case Z_OK: {
       intptr_t processed = length - stream_.avail_out;
       if (processed == 0) {
         delete[] current_buffer_;
         current_buffer_ = NULL;
         return 0;
       } else {
         // We processed data, should be called again.
         return processed;
       }
     }
 
-    case Z_STREAM_END:
-    case Z_BUF_ERROR:
-      // We processed all available input data.
-      delete[] current_buffer_;
-      current_buffer_ = NULL;
-      return 0;
-
     default:
     case Z_MEM_ERROR:
     case Z_NEED_DICT:
     case Z_DATA_ERROR:
     case Z_STREAM_ERROR:
       // An error occoured.
       delete[] current_buffer_;
       current_buffer_ = NULL;
       return -1;
   }
 }