Reimplement devfs in dart. Implementation now writes to disk.

runtime/vm/dev_fs.h

Index: runtime/vm/dev_fs.h
diff --git a/runtime/vm/dev_fs.h b/runtime/vm/dev_fs.h
deleted file mode 100644
index 75032bda8f0c663a61947b5f7de8c56b183f1b02..0000000000000000000000000000000000000000
--- a/runtime/vm/dev_fs.h
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-#ifndef VM_DEV_FS_H_
-#define VM_DEV_FS_H_
-
-#include "vm/globals.h"
-
-#include "vm/dart_api_impl.h"
-
-namespace dart {
-
-class Array;
-class FileSystem;
-class JSONStream;
-class Mutex;
-class ObjectPointerVisitor;
-class RawArray;
-class RawObject;
-class String;
-
-
-// Manages dart-devfs:// file systems. These file systems are "virtual"
-// and accessed via the service protocol.
-class DevFS {
- public:
-  static void Init();
-  static void Cleanup();
-
-  static void ListFileSystems(JSONStream* js);
-  static void CreateFileSystem(JSONStream* js, const String& fs_name);
-  static void DeleteFileSystem(JSONStream* js, const String& fs_name);
-  static void ListFiles(JSONStream* js,
-                        const String& fs_name);
-  static void WriteFiles(JSONStream* js,
-                         const String& fs_name,
-                         const Array& files);
-  static void WriteFile(JSONStream* js,
-                        const String& fs_name,
-                        const String& path,
-                        const String& file_contents);
-  static void ReadFile(JSONStream* js,
-                       const String& fs_name,
-                       const String& path);
-
- private:
-  static Mutex* mutex_;
-  static FileSystem* LookupFileSystem(const String& fs_name);
-  static FileSystem* LookupFileSystem(const char* fs_name);
-};
-
-}  // namespace dart
-
-#endif  // VM_DEV_FS_H_