Remove unused V8 integration code in Sky

sky/engine/bindings/core/v8/ScriptPromiseProperty.h

-// 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.
-
-#ifndef SKY_ENGINE_BINDINGS_CORE_V8_SCRIPTPROMISEPROPERTY_H_
-#define SKY_ENGINE_BINDINGS_CORE_V8_SCRIPTPROMISEPROPERTY_H_
-
-#include "sky/engine/bindings/core/v8/ScriptPromise.h"
-#include "sky/engine/bindings/core/v8/ScriptPromisePropertyBase.h"
-#include "sky/engine/bindings/core/v8/V8Binding.h"
-#include "sky/engine/wtf/Noncopyable.h"
-#include "sky/engine/wtf/PassRefPtr.h"
-
-namespace blink {
-
-class ExecutionContext;
-
-// ScriptPromiseProperty is a helper for implementing a DOM method or
-// attribute whose value is a Promise, and the same Promise must be
-// returned each time.
-//
-// ScriptPromiseProperty does not keep Promises or worlds alive to
-// deliver Promise resolution/rejection to them; the Promise
-// resolution/rejections are delivered if the holder's wrapper is
-// alive. This is achieved by keeping a weak reference from
-// ScriptPromiseProperty to the holder's wrapper, and references in
-// hidden values from the wrapper to the promise and resolver
-// (coincidentally the Resolver and Promise may be the same object,
-// but that is an implementation detail of v8.)
-//
-//                                             ----> Resolver
-//                                            /
-// ScriptPromiseProperty - - -> Holder Wrapper ----> Promise
-//
-// To avoid exposing the action of the garbage collector to script,
-// you should keep the wrapper alive as long as a promise may be
-// settled.
-//
-// To avoid clobbering hidden values, a holder should only have one
-// ScriptPromiseProperty object for a given name at a time. See reset.
-template<typename HolderType, typename ResolvedType, typename RejectedType>
-class ScriptPromiseProperty : public ScriptPromisePropertyBase {
-    WTF_MAKE_NONCOPYABLE(ScriptPromiseProperty);
-public:
-    // Creates a ScriptPromiseProperty that will create Promises in
-    // the specified ExecutionContext for a property of 'holder'
-    // (typically ScriptPromiseProperty should be a member of the
-    // property holder).
-    //
-    // When implementing a ScriptPromiseProperty add the property name
-    // to ScriptPromiseProperties.h and pass
-    // ScriptPromiseProperty::Foo to create. The name must be unique
-    // per kind of holder.
-    template<typename PassHolderType>
-    ScriptPromiseProperty(ExecutionContext*, PassHolderType, Name);
-
-    virtual ~ScriptPromiseProperty() { }
-
-    template<typename PassResolvedType>
-    void resolve(PassResolvedType);
-
-    template<typename PassRejectedType>
-    void reject(PassRejectedType);
-
-    // Resets this property by unregistering the Promise property from the
-    // holder wrapper. Resets the internal state to Pending and clears the
-    // resolved and the rejected values.
-    // This method keeps the holder object and the property name.
-    void reset();
-
-private:
-    virtual v8::Handle<v8::Object> holder(v8::Handle<v8::Object> creationContext, v8::Isolate*) override;
-    virtual v8::Handle<v8::Value> resolvedValue(v8::Handle<v8::Object> creationContext, v8::Isolate*) override;
-    virtual v8::Handle<v8::Value> rejectedValue(v8::Handle<v8::Object> creationContext, v8::Isolate*) override;
-
-    HolderType m_holder;
-    ResolvedType m_resolved;
-    RejectedType m_rejected;
-};
-
-template<typename HolderType, typename ResolvedType, typename RejectedType>
-template<typename PassHolderType>
-ScriptPromiseProperty<HolderType, ResolvedType, RejectedType>::ScriptPromiseProperty(ExecutionContext* executionContext, PassHolderType holder, Name name)
-    : ScriptPromisePropertyBase(executionContext, name)
-    , m_holder(holder)
-{
-}
-
-template<typename HolderType, typename ResolvedType, typename RejectedType>
-template<typename PassResolvedType>
-void ScriptPromiseProperty<HolderType, ResolvedType, RejectedType>::resolve(PassResolvedType value)
-{
-    if (state() != Pending) {
-        ASSERT_NOT_REACHED();
-        return;
-    }
-    if (!executionContext() || executionContext()->activeDOMObjectsAreStopped())
-        return;
-    m_resolved = value;
-    resolveOrReject(Resolved);
-}
-
-template<typename HolderType, typename ResolvedType, typename RejectedType>
-template<typename PassRejectedType>
-void ScriptPromiseProperty<HolderType, ResolvedType, RejectedType>::reject(PassRejectedType value)
-{
-    if (state() != Pending) {
-        ASSERT_NOT_REACHED();
-        return;
-    }
-    if (!executionContext() || executionContext()->activeDOMObjectsAreStopped())
-        return;
-    m_rejected = value;
-    resolveOrReject(Rejected);
-}
-
-template<typename HolderType, typename ResolvedType, typename RejectedType>
-v8::Handle<v8::Object> ScriptPromiseProperty<HolderType, ResolvedType, RejectedType>::holder(v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
-{
-    v8::Handle<v8::Value> value = V8ValueTraits<HolderType>::toV8Value(m_holder, creationContext, isolate);
-    return value.As<v8::Object>();
-}
-
-template<typename HolderType, typename ResolvedType, typename RejectedType>
-v8::Handle<v8::Value> ScriptPromiseProperty<HolderType, ResolvedType, RejectedType>::resolvedValue(v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
-{
-    ASSERT(state() == Resolved);
-    return V8ValueTraits<ResolvedType>::toV8Value(m_resolved, creationContext, isolate);
-}
-
-template<typename HolderType, typename ResolvedType, typename RejectedType>
-v8::Handle<v8::Value> ScriptPromiseProperty<HolderType, ResolvedType, RejectedType>::rejectedValue(v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
-{
-    ASSERT(state() == Rejected);
-    return V8ValueTraits<RejectedType>::toV8Value(m_rejected, creationContext, isolate);
-}
-
-template<typename HolderType, typename ResolvedType, typename RejectedType>
-void ScriptPromiseProperty<HolderType, ResolvedType, RejectedType>::reset()
-{
-    resetBase();
-    m_resolved = ResolvedType();
-    m_rejected = RejectedType();
-}
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_BINDINGS_CORE_V8_SCRIPTPROMISEPROPERTY_H_