Dart: Reorganize files

mojo/dart/dart_snapshotter/vm.cc

-// Copyright 2015 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 "mojo/dart/dart_snapshotter/vm.h"
-
-#include "base/logging.h"
-#include "tonic/dart_error.h"
-#include "tonic/dart_state.h"
-
-namespace mojo {
-namespace dart {
-extern const uint8_t* vm_isolate_snapshot_buffer;
-extern const uint8_t* isolate_snapshot_buffer;
-}
-}
-
-static const char* kDartArgs[] = {
-    "--enable_mirrors=false",
-};
-
-void InitDartVM() {
-  CHECK(Dart_SetVMFlags(arraysize(kDartArgs), kDartArgs));
-  CHECK(Dart_Initialize(mojo::dart::vm_isolate_snapshot_buffer, nullptr,
-                        nullptr, nullptr, nullptr, nullptr, nullptr, nullptr,
-                        nullptr, nullptr, nullptr, nullptr) == nullptr);
-}
-
-Dart_Isolate CreateDartIsolate() {
-  CHECK(mojo::dart::isolate_snapshot_buffer);
-  char* error = nullptr;
-  auto isolate_data = new SnapshotterDartState();
-  CHECK(isolate_data != nullptr);
-  Dart_Isolate isolate = Dart_CreateIsolate("dart:snapshot",
-                                            "main",
-                                            mojo::dart::isolate_snapshot_buffer,
-                                            nullptr,
-                                            isolate_data,
-                                            &error);
-  CHECK(isolate) << error;
-  Dart_ExitIsolate();
-  isolate_data->SetIsolate(isolate);
-  return isolate;
-}