[NaCl SDK] Expose Google Drive to nacl_io.

native_client_sdk/src/libraries/nacl_io/html5fs/html5_fs.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/html5fs/html5_fs.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include <algorithm>
 
 #include <ppapi/c/pp_completion_callback.h>
 #include <ppapi/c/pp_errors.h>
 
+#include "nacl_io/hash.h"
 #include "nacl_io/html5fs/html5_fs_node.h"
 #include "sdk_util/auto_lock.h"
 
 namespace nacl_io {
 
 namespace {
 
 #if defined(WIN32)
 int64_t strtoull(const char* nptr, char** endptr, int base) {
   return _strtoui64(nptr, endptr, base);
 }
 #endif
 
 }  // namespace
 
-// Continuing DJB2a hash
-ino_t Html5Fs::HashPathSegment(ino_t hash, const char *str, size_t len) {
-  // First add the path seperator
-  hash = (hash * static_cast<ino_t>(33)) ^ '/';
-  while (len--) {
-    hash = (hash * static_cast<ino_t>(33)) ^ *str++;
-  }
-  return hash;
-}
-
-ino_t Html5Fs::HashPath(const Path& path) {
-  // Prime the DJB2a hash
-  ino_t hash = 5381;
-
-  // Apply a running DJB2a to each part of the path
-  for (size_t segment = 0; segment < path.Size(); segment++) {
-    const std::string& part = path.Part(segment);
-    hash = HashPathSegment(hash, part.c_str(), part.length());
-  }
-  return hash;
-}
-
-
 // For HTML5, the INO should be the one used by the system, however PPAPI
 // does not provide access to the real INO.  Instead, since HTML5 does not
 // suport links, we assume that files are unique based on path to the base
 // of the mount.
 void Html5Fs::OnNodeCreated(Node* node) {
   node->stat_.st_dev = dev_;
 }
 
 void Html5Fs::OnNodeDestroyed(Node* node) {}
 
@@ skipping 273 matching lines @@
 }
 
 void Html5Fs::FilesystemOpenCallback(int32_t result) {
   AUTO_LOCK(filesysem_open_lock_);
   filesystem_open_has_result_ = true;
   filesystem_open_error_ = PPERROR_TO_ERRNO(result);
   pthread_cond_signal(&filesystem_open_cond_);
 }
 
 }  // namespace nacl_io