Begin implementing V8 bindings for Mojo

mojo/public/bindings/js/v8_exceptions.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_exceptions.h"
+
+#include "mojo/public/bindings/js/v8_core.h"
+
+namespace mojo {
+namespace js {
+
+const char kInsufficientArguments[] = "Insufficient number of arguments.";
+
+void ThrowTypeError(v8::Isolate* isolate, const char* message) {

[Aaron Boodman, 2013/11/09 08:26:02]

Nit: you are using 'type' error in cases where it's not really a type error,
like when an incorrect number of arguments are passed to a function.

[abarth-chromium, 2013/11/09 08:52:37]

TypeError is what the we throw for insufficient arguments in Blink.  I think
that's in the WebIDL spec.  I'm happy to throw a different exception if you'd
prefer.

[Aaron Boodman, 2013/11/09 21:12:12]

Oh, if that's what's in the IDL spec, that's a good justification.

+  v8::Handle<v8::String> string = v8::String::New(message);
+  isolate->ThrowException(v8::Exception::TypeError(string));
+}
+
+}  // namespace js
+}  // mojo