Begin implementing V8 bindings for Mojo

mojo/public/bindings/js/v8_string.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_string.h"
+
+namespace mojo {
+namespace js {
+
+v8::Handle<v8::String> Wrapper<std::string>::ToObject(v8::Isolate* isolate,
+                                                      std::string native) {
+  return v8::String::NewFromUtf8(isolate,
+                                 native.data(),
+                                 v8::String::kNormalString,
+                                 native.length());
+}
+
+std::string Wrapper<std::string>::ToNative(v8::Handle<v8::Value> value) {
+  if (!value->IsString())
+    return std::string();
+  v8::Handle<v8::String> string = v8::Handle<v8::String>::Cast(value);
+  int length = string->Utf8Length();
+  std::string result;
+  result.resize(length);
+  string->WriteUtf8(&result[0], length, NULL, v8::String::NO_NULL_TERMINATION);
+  return result;
+}
+
+}  // namespace js
+}  // namespace mojo