[NaCl SDK] nacl_io: HTTP mount bugfix, w/ packaged app and content cache.

native_client_sdk/src/libraries/nacl_io/mount_http.cc

 /* Copyright (c) 2012 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/mount_http.h"
 #include <assert.h>
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>
@@ skipping 400 matching lines @@
     if (real_size < 0)
       return -1;
 
     SetCachedSize(real_size);
     cached_data_.resize(real_size);
     return real_size;
   }
 
   // We don't know how big the file is. Read in chunks.
   cached_data_.resize(MAX_READ_BUFFER_SIZE);
-  char* buf = cached_data_.data();
   size_t total_bytes_read = 0;
   size_t bytes_to_read = MAX_READ_BUFFER_SIZE;
   while (true) {
+    char* buf = cached_data_.data() + total_bytes_read;
     int bytes_read = DownloadToBuffer(loader, buf, bytes_to_read);
     if (bytes_read < 0)
       return -1;
 
     total_bytes_read += bytes_read;
 
     if (bytes_read < bytes_to_read) {
       SetCachedSize(total_bytes_read);
       cached_data_.resize(total_bytes_read);
       return total_bytes_read;
     }
 
-    buf += bytes_read;
     cached_data_.resize(total_bytes_read + bytes_to_read);
   }
 }
 
 int MountNodeHttp::ReadPartialFromCache(size_t offs, void* buf, size_t count) {
   if (offs > cached_data_.size()) {
     errno = EINVAL;
     return -1;
   }
 
@@ skipping 346 matching lines @@
     off_t len = manifest_node->Read(0, text, manifest_node->GetSize());
     manifest_node->Release();
 
     text[len] = 0;
     return text;
   }
 
   fprintf(stderr, "Could not open manifest: %s\n", manifest_name.c_str());
   return NULL;
 }