Add the c++ code part of bindings2/

sky/engine/bindings2/builtin_sky.cc

Index: sky/engine/bindings2/builtin_sky.cc
diff --git a/sky/engine/bindings2/builtin_sky.cc b/sky/engine/bindings2/builtin_sky.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b8038c9b18220eea6e24e546fb1a414a7291f5ce
--- /dev/null
+++ b/sky/engine/bindings2/builtin_sky.cc
@@ -0,0 +1,36 @@
+// Copyright 2014 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/engine/config.h"
+#include "sky/engine/bindings2/builtin_sky.h"
+
+#include "sky/engine/bindings2/builtin.h"
+#include "sky/engine/core/frame/LocalDOMWindow.h"
+#include "sky/engine/core/script/dom_dart_state.h"
+#include "sky/engine/tonic/dart_error.h"
+
+namespace blink {
+
+BuiltinSky::BuiltinSky(DOMDartState* dart_state) {
+  Builtin::SetNativeResolver(Builtin::kSkyLibrary);
+  library_.Set(dart_state, Builtin::LoadAndCheckLibrary(Builtin::kSkyLibrary));
+}
+
+BuiltinSky::~BuiltinSky() {
+}
+
+void BuiltinSky::InstallWindow(DOMDartState* dart_state) {
+  CHECK(!LogIfError(Dart_SetField(library_.value(),
+    Dart_NewStringFromCString("window"),
+    ToDart(dart_state->CurrentWindow()))));

[abarth-chromium, 2015/02/12 20:52:32]

Can you add a TODO comment here about needing to retain the document wrapper?

+}
+
+Dart_Handle BuiltinSky::GetClassByName(const char* class_name) {
+  Dart_Handle name_handle = Dart_NewStringFromCString(class_name);
+  Dart_Handle class_handle = Dart_GetType(library_.value(), name_handle, 0, nullptr);
+  DCHECK(!Dart_IsError(class_handle)) << class_name;
+  return class_handle;
+}
+
+}  // namespace blink