Introduce sky_packager

sky/tools/packager/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 "sky/tools/packager/vm.h"
+
+#include "base/logging.h"
+#include "sky/tools/packager/loader.h"
+#include "sky/tools/packager/logging.h"
+
+namespace blink {
+extern const uint8_t* kDartVmIsolateSnapshotBuffer;
+extern const uint8_t* kDartIsolateSnapshotBuffer;
+}
+
+void InitDartVM() {
+  int argc = 0;
+  const char** argv = nullptr;
+
+  CHECK(Dart_SetVMFlags(argc, argv));
+  CHECK(Dart_Initialize(blink::kDartVmIsolateSnapshotBuffer,
+                        nullptr,  // Isolate created callback.
+                        nullptr,  // Isolate interrupt callback.
+                        nullptr,  // Unhandled exception callback.
+                        nullptr,  // Isolate shutdown callback.
+                        // File IO callbacks.
+                        nullptr, nullptr, nullptr, nullptr, nullptr));
+}
+
+Dart_Isolate CreateDartIsolate() {
+  CHECK(blink::kDartIsolateSnapshotBuffer);
+  char* error = nullptr;
+  Dart_Isolate isolate =
+      Dart_CreateIsolate("http://example.com", "main",
+                         blink::kDartIsolateSnapshotBuffer, nullptr, &error);
+
+  CHECK(isolate) << error;
+  CHECK(!LogIfError(Dart_SetLibraryTagHandler(HandleLibraryTag)));
+  LoadSkyInternals();
+
+  Dart_ExitIsolate();
+  return isolate;
+}