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

runtime/bin/filter.cc

Index: runtime/bin/filter.cc
diff --git a/runtime/bin/filter.cc b/runtime/bin/filter.cc
index 61a499cde491e862f3e874dda2a7ddb736390e90..1a609c576e36ab8e4b28df00c655ba9617f029aa 100644
--- a/runtime/bin/filter.cc
+++ b/runtime/bin/filter.cc
@@ -278,6 +278,8 @@ intptr_t ZLibInflateFilter::Processed(uint8_t* buffer,
   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) {
@@ -290,13 +292,6 @@ intptr_t ZLibInflateFilter::Processed(uint8_t* buffer,
       }
     }
 
-    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: