Remove unused V8 integration code in Sky

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

-/*
- * Copyright (C) 2013 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef SKY_ENGINE_BINDINGS_CORE_V8_CALLBACKPROMISEADAPTER_H_
-#define SKY_ENGINE_BINDINGS_CORE_V8_CALLBACKPROMISEADAPTER_H_
-
-#include "sky/engine/bindings/core/v8/ScriptPromiseResolver.h"
-#include "sky/engine/public/platform/WebCallbacks.h"
-
-namespace blink {
-
-// This class provides an easy way to convert from a Script-exposed
-// class (i.e. a class that has a toV8() overload) that uses Promises
-// to a WebKit API class that uses WebCallbacks. You can define
-// separate Success and Error classes, but this example just uses one
-// object for both.
-//
-// To use:
-//
-// class MyClass ... {
-//    typedef blink::WebMyClass WebType;
-//    static PassRefPtr<MyClass> take(ScriptPromiseResolver* resolver,
-//                                    blink::WebMyClass* webInstance) {
-//        // convert/create as appropriate, but often it's just:
-//        return MyClass::create(adoptPtr(webInstance));
-//
-//        // Since promise resolving is done as an async task, it's not
-//        // guaranteed that the script context has seen the promise resolve
-//        // immediately after calling onSuccess/onError. You can use the
-//        // ScriptPromise from the resolver to schedule a task that executes
-//        // after resolving:
-//        ScriptState::Scope scope(resolver->scriptState());
-//        resolver->promise().then(...);
-//    }
-//
-//    // Called when aborting to resolve/reject a promise due to an empty
-//    // execution context.
-//    static void dispose(blink::WebMyClass* webInstance) {
-//        // delete as appropriate, but often it's just:
-//        delete webInstance;
-//    }
-//
-// Now when calling into a WebKit API that requires a WebCallbacks<blink::WebMyClass, blink::WebMyClass>*:
-//
-//    // call signature: callSomeMethod(WebCallbacks<MyClass, MyClass>* callbacks)
-//    webObject->callSomeMethod(new CallbackPromiseAdapter<MyClass, MyClass>(resolver, scriptExecutionContext));
-//
-// Note that this class does not manage its own lifetime. In this
-// example that ownership of the WebCallbacks instance is being passed
-// in and it is up to the callee to free the WebCallbacks instace.
-template<typename S, typename T>
-class CallbackPromiseAdapter final : public blink::WebCallbacks<typename S::WebType, typename T::WebType> {
-public:
-    explicit CallbackPromiseAdapter(PassRefPtr<ScriptPromiseResolver> resolver)
-        : m_resolver(resolver)
-    {
-        ASSERT(m_resolver);
-    }
-    virtual ~CallbackPromiseAdapter() { }
-
-    virtual void onSuccess(typename S::WebType* result) override
-    {
-        if (!m_resolver->executionContext() || m_resolver->executionContext()->activeDOMObjectsAreStopped()) {
-            S::dispose(result);
-            return;
-        }
-        m_resolver->resolve(S::take(m_resolver.get(), result));
-    }
-
-    virtual void onError(typename T::WebType* error) override
-    {
-        if (!m_resolver->executionContext() || m_resolver->executionContext()->activeDOMObjectsAreStopped()) {
-            T::dispose(error);
-            return;
-        }
-        m_resolver->reject(T::take(m_resolver.get(), error));
-    }
-
-private:
-    RefPtr<ScriptPromiseResolver> m_resolver;
-    WTF_MAKE_NONCOPYABLE(CallbackPromiseAdapter);
-};
-
-template<typename T>
-class CallbackPromiseAdapter<void, T> final : public blink::WebCallbacks<void, typename T::WebType> {
-public:
-    explicit CallbackPromiseAdapter(PassRefPtr<ScriptPromiseResolver> resolver)
-        : m_resolver(resolver)
-    {
-        ASSERT(m_resolver);
-    }
-    virtual ~CallbackPromiseAdapter() { }
-
-    virtual void onSuccess() override
-    {
-        if (!m_resolver->executionContext() || m_resolver->executionContext()->activeDOMObjectsAreStopped()) {
-            return;
-        }
-        m_resolver->resolve(V8UndefinedType());
-    }
-
-    virtual void onError(typename T::WebType* error) override
-    {
-        if (!m_resolver->executionContext() || m_resolver->executionContext()->activeDOMObjectsAreStopped()) {
-            T::dispose(error);
-            return;
-        }
-        m_resolver->reject(T::take(m_resolver.get(), error));
-    }
-
-private:
-    RefPtr<ScriptPromiseResolver> m_resolver;
-    WTF_MAKE_NONCOPYABLE(CallbackPromiseAdapter);
-};
-
-} // namespace blink
-
-#endif  // SKY_ENGINE_BINDINGS_CORE_V8_CALLBACKPROMISEADAPTER_H_