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

native_client_sdk/src/libraries/nacl_io/memfs/mem_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.
 
 #ifndef __STDC_LIMIT_MACROS
 #define __STDC_LIMIT_MACROS
 #endif
 
 #include "nacl_io/memfs/mem_fs_node.h"
 
@@ skipping 19 matching lines @@
 }  // namespace
 
 MemFsNode::MemFsNode(Filesystem* filesystem)
   : Node(filesystem),
     data_(NULL),
     data_capacity_(0) {
   SetType(S_IFREG);
 }
 
 MemFsNode::~MemFsNode() {
+  free(data_);
 }
 
 Error MemFsNode::Read(const HandleAttr& attr,
                       void* buf,
                       size_t count,
                       int* out_bytes) {
   *out_bytes = 0;
 
   AUTO_LOCK(node_lock_);
   if (count == 0)
@@ skipping 66 matching lines @@
     data_capacity_ = new_capacity;
   }
 
   if (new_length > stat_.st_size)
     memset(data_ + stat_.st_size, 0, new_length - stat_.st_size);
   stat_.st_size = new_length;
   return 0;
 }
 
 }  // namespace nacl_io