Begin implementing V8 bindings for Mojo

mojo/public/bindings/js/v8_string.h

Index: mojo/public/bindings/js/v8_string.h
diff --git a/mojo/public/bindings/js/v8_string.h b/mojo/public/bindings/js/v8_string.h
new file mode 100644
index 0000000000000000000000000000000000000000..9d8d95ae1be2502cc929656a68ebbabf2a9f3449
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+++ b/mojo/public/bindings/js/v8_string.h
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+// 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.
+
+#ifndef MOJO_PUBLIC_BINDINGS_JS_V8_STRING_H_
+#define MOJO_PUBLIC_BINDINGS_JS_V8_STRING_H_
+
+#include <string>
+
+#include "mojo/public/bindings/js/v8_wrapper.h"
+
+namespace mojo {
+namespace js {
+
+// TODO(abarth): Currently our Wrapper<std::string> is a very basic "always
+// copy" implementation. Eventually, we'll want to avoid copies using external
+// string.
+
+template<>
+struct Wrapper<std::string> {
+  static v8::Handle<v8::String> ToObject(v8::Isolate* isolate,
+                                         std::string native);
+  static std::string ToNative(v8::Handle<v8::Value> value);
+};
+
+}  // namespace js
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_BINDINGS_JS_V8_STRING_H_