Begin implementing V8 bindings for Mojo

mojo/public/bindings/js/v8_wrapper.cc

+// Copyright 2013 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/public/bindings/js/v8_wrapper.h"
+
+namespace mojo {
+namespace js {
+
+WrapperInfo* WrapperInfo::From(v8::Handle<v8::Object> object) {
+  if (object->InternalFieldCount() != kNumberOfInternalFields)
+    return NULL;
+  return static_cast<WrapperInfo*>(
+      object->GetAlignedPointerFromInternalField(kWrapperInfoIndex));
+}
+
+// Wrapper<int32_t> -----------------------------------------------------------
+
+v8::Handle<v8::Value> Wrapper<int32_t>::ToObject(v8::Isolate* isolate,
+                                                 int32_t native) {
+  return v8::Integer::New(native);
+}
+
+int32_t Wrapper<int32_t>::ToNative(v8::Handle<v8::Value> value) {
+  return value->Int32Value();
+}
+
+// Wrapper<uint32_t> ----------------------------------------------------------
+
+v8::Handle<v8::Value> Wrapper<uint32_t>::ToObject(v8::Isolate* isolate,
+                                                  uint32_t native) {
+  return v8::Integer::NewFromUnsigned(native);
+}
+
+uint32_t Wrapper<uint32_t>::ToNative(v8::Handle<v8::Value> value) {
+  return value->Uint32Value();
+}
+
+// Wrapper<uint64_t> ----------------------------------------------------------
+
+v8::Handle<v8::Value> Wrapper<uint64_t>::ToObject(v8::Isolate* isolate,
+                                                  uint64_t native) {
+  return v8::Integer::NewFromUnsigned(native);
+}
+
+uint64_t Wrapper<uint64_t>::ToNative(v8::Handle<v8::Value> value) {
+  return value->IntegerValue();
+}
+
+}  // namespace js
+}  // namespace mojo