[NaCl SDK] nacl_io: Fix gaping memory leaks in memfs and htmlfs

native_client_sdk/src/libraries/nacl_io/httpfs/http_fs_node.cc

 // Copyright 2013 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.
 
 #include "nacl_io/httpfs/http_fs_node.h"
 
 #include <assert.h>
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>
@@ skipping 203 matching lines @@
     : Node(filesystem),
       url_(url),
       buffer_(NULL),
       buffer_len_(0),
       cache_content_(cache_content),
       has_cached_size_(false) {
   // http nodes are read-only by default
   SetMode(S_IRALL);
 }
 
+HttpFsNode::~HttpFsNode() {
+  free(buffer_);
+}
+
 Error HttpFsNode::GetStat_Locked(struct stat* stat) {
   // Assume we need to 'HEAD' if we do not know the size, otherwise, assume
   // that the information is constant.  We can add a timeout if needed.
   HttpFs* filesystem = static_cast<HttpFs*>(filesystem_);
   if (!has_cached_size_ || !filesystem->cache_stat_) {
     StringMap_t headers;
     ScopedResource loader(filesystem_->ppapi());
     ScopedResource request(filesystem_->ppapi());
     ScopedResource response(filesystem_->ppapi());
     int32_t statuscode;
@@ skipping 422 matching lines @@
     assert(bytes_read <= bytes_to_read);
     bytes_to_read -= bytes_read;
     out_buffer += bytes_read;
   }
 
   *out_bytes = count;
   return 0;
 }
 
 }  // namespace nacl_io