[NaCl SDK] nacl_io: Always create directory node in http filesystem root.

native_client_sdk/src/libraries/nacl_io/httpfs/http_fs.h

 // 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 LIBRARIES_NACL_IO_HTTPFS_HTTP_FS_H_
 #define LIBRARIES_NACL_IO_HTTPFS_HTTP_FS_H_
 
 #include <string>
 #include "nacl_io/filesystem.h"
 #include "nacl_io/pepper_interface.h"
@@ skipping 17 matching lines @@
 
   PP_Resource MakeUrlRequestInfo(const std::string& url,
                                  const char* method,
                                  StringMap_t* additional_headers);
 
  protected:
   HttpFs();
 
   virtual Error Init(const FsInitArgs& args);
   virtual void Destroy();
+  ScopedNode FindExistingNode(const Path& path);
   Error FindOrCreateDir(const Path& path, ScopedNode* out_node);
   Error LoadManifest(const std::string& path, char** out_manifest);
   Error ParseManifest(const char* text);
 
   NodeMap_t* GetNodeCacheForTesting() { return &node_cache_; }
 
  private:
 
   // Gets the URL to fetch for |path|.
   // |path| is relative to the mount point for the HTTP filesystem.
   std::string MakeUrl(const Path& path);
 
   std::string url_root_;
   StringMap_t headers_;
   NodeMap_t node_cache_;
   bool allow_cors_;
   bool allow_credentials_;
   bool cache_stat_;
   bool cache_content_;
   bool is_blob_url_;
 
   friend class TypedFsFactory<HttpFs>;
   friend class HttpFsNode;
 };
 
 }  // namespace nacl_io
 
 #endif  // LIBRARIES_NACL_IO_HTTPFS_HTTP_FS_H_