Add the c++ code part of bindings2/

sky/engine/bindings2/builtin.cc

Index: sky/engine/bindings2/builtin.cc
diff --git a/sky/engine/bindings2/builtin.cc b/sky/engine/bindings2/builtin.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5938de54aa752cd07eef8e49010275dfdae20447
--- /dev/null
+++ b/sky/engine/bindings2/builtin.cc
@@ -0,0 +1,60 @@
+// 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/engine/config.h"
+#include "sky/engine/bindings2/builtin.h"
+
+#include "base/logging.h"
+#include "dart/runtime/include/dart_api.h"
+#include "gen/sky/bindings/DartGlobal.h"
+#include "sky/engine/bindings2/builtin_natives.h"
+#include "sky/engine/bindings2/builtin_sky.h"
+#include "sky/engine/bindings2/mojo_natives.h"
+
+namespace blink {
+namespace {
+
+struct LibraryDescriptor {
+  const char* url;
+  bool has_natives;
+  Dart_NativeEntrySymbol native_symbol;
+  Dart_NativeEntryResolver native_resolver;
+};
+
+const LibraryDescriptor kBuiltinLibraries[] = {
+    /* { url_, has_natives_, native_symbol_, native_resolver_ } */
+    {"dart:sky_builtin", true, BuiltinNatives::NativeSymbol, BuiltinNatives::NativeLookup},
+    {"dart:sky", true, skySnapshotSymbolizer, skySnapshotResolver},
+    {"dart:mojo_bindings", false, nullptr, nullptr},
+    {"dart:mojo_core", true, MojoNativeSymbol, MojoNativeLookup},
+};
+
+}  // namespace
+
+void Builtin::SetNativeResolver(BuiltinLibraryId id) {
+  static_assert(arraysize(kBuiltinLibraries) == kInvalidLibrary,
+      "Unexpected number of builtin libraries");
+  DCHECK_GE(id, kBuiltinLibrary);
+  DCHECK_LT(id, kInvalidLibrary);
+  if (kBuiltinLibraries[id].has_natives) {
+    Dart_Handle library = DartBuiltin::LookupLibrary(kBuiltinLibraries[id].url);
+    // Setup the native resolver for built in library functions.
+    DART_CHECK_VALID(
+        Dart_SetNativeResolver(library,
+                               kBuiltinLibraries[id].native_resolver,
+                               kBuiltinLibraries[id].native_symbol));
+  }
+}
+
+Dart_Handle Builtin::LoadAndCheckLibrary(BuiltinLibraryId id) {
+  static_assert(arraysize(kBuiltinLibraries) == kInvalidLibrary,
+      "Unexpected number of builtin libraries");
+  DCHECK_GE(id, kBuiltinLibrary);
+  DCHECK_LT(id, kInvalidLibrary);
+  Dart_Handle library = DartBuiltin::LookupLibrary(kBuiltinLibraries[id].url);
+  DART_CHECK_VALID(library);
+  return library;
+}
+
+}  // namespace blink