Begin implementing V8 bindings for Mojo

mojo/public/bindings/js/v8_per_isolate_data.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_per_isolate_data.h"
+
+#include "mojo/public/bindings/js/v8_core.h"
+#include "mojo/public/bindings/js/v8_mojo.h"
+
+namespace mojo {
+namespace js {
+
+V8PerIsolateData::V8PerIsolateData(v8::Isolate* isolate)
+    : isolate_(isolate),
+      handle_template_(isolate, Wrapper<mojo::Handle>::CreateTemplate()),
+      mojo_template_(isolate, CreateMojoTemplate()) {

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

I think it is possible to reduce the duplication and coupling here a bit if you
want:

class V8PerIsolatedData {
 public:
  static v8::Local<v8::ObjectTemplate> GetTemplate(WrapperTypeID id,
v8::Isolate* isolate) {
    ...
  }

  static void SetTemplate(WrapperTypeID id, v8::Local<v8::ObjectTemplate> templ,
v8::Isolate* isolate) {
    ...
  }

 private:
  typedef std::map<WrapperTypeID, v8::Eternal<v8::ObjectTemplate> > StuffMap;
  StuffMap stuff_;
};

...

typdef WrapperInfo* WrapperTypeID;

template<typename T>
struct Wrapper {
 public:
  static WrapperTypeID type_id() {
    return &wrapper_info;
  }

 private:
  // If you decide to get rid of the static non-primitive data, this can just
  // be a bool for now.
  static WrapperInfo wrapper_info;
};


This way, Wrapper<T>::CreateTemplate() doesn't need to be public - lazily
creating and caching the ObjectTemplate per-isolate can be impl detail of
Wrapper<T>.

[abarth-chromium, 2013/11/09 08:52:38]

Will do.  That will make it easier to separate the Mojo-independent pieces.

+  isolate_->SetData(this);
+}
+
+V8PerIsolateData::~V8PerIsolateData() {
+}
+
+V8PerIsolateData* V8PerIsolateData::From(v8::Isolate* isolate) {
+  return static_cast<V8PerIsolateData*>(isolate->GetData());
+}
+
+}  // namespace js
+}  // namespace mojo