Move ScriptWrappable and dependencies to platform/bindings

third_party/WebKit/Source/bindings/core/v8/ScriptState.cpp

-// Copyright 2014 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 "bindings/core/v8/ScriptState.h"
-
-#include "bindings/core/v8/V8Binding.h"
-#include "core/dom/ExecutionContext.h"
-
-namespace blink {
-
-PassRefPtr<ScriptState> ScriptState::Create(v8::Local<v8::Context> context,
-                                            PassRefPtr<DOMWrapperWorld> world) {
-  RefPtr<ScriptState> script_state =
-      AdoptRef(new ScriptState(context, std::move(world)));
-  // This ref() is for keeping this ScriptState alive as long as the v8::Context
-  // is alive.  This is deref()ed in the weak callback of the v8::Context.
-  script_state->Ref();
-  return script_state;
-}
-
-static void DerefCallback(const v8::WeakCallbackInfo<ScriptState>& data) {
-  data.GetParameter()->Deref();
-}
-
-static void ContextCollectedCallback(
-    const v8::WeakCallbackInfo<ScriptState>& data) {
-  data.GetParameter()->ClearContext();
-  data.SetSecondPassCallback(DerefCallback);
-}
-
-ScriptState::ScriptState(v8::Local<v8::Context> context,
-                         PassRefPtr<DOMWrapperWorld> world)
-    : isolate_(context->GetIsolate()),
-      context_(isolate_, context),
-      world_(std::move(world)),
-      per_context_data_(V8PerContextData::Create(context)) {
-  DCHECK(world_);
-  context_.SetWeak(this, &ContextCollectedCallback);
-  context->SetAlignedPointerInEmbedderData(kV8ContextPerContextDataIndex, this);
-}
-
-ScriptState::~ScriptState() {
-  DCHECK(!per_context_data_);
-  DCHECK(context_.IsEmpty());
-}
-
-void ScriptState::DetachGlobalObject() {
-  DCHECK(!context_.IsEmpty());
-  GetContext()->DetachGlobal();
-}
-
-void ScriptState::DisposePerContextData() {
-  per_context_data_ = nullptr;
-}
-
-}  // namespace blink