Add support for CallbackPromiseAdapter<void, T> matching WebCallbacks<void, T>.

Source/bindings/core/v8/CallbackPromiseAdapter.h

Index: Source/bindings/core/v8/CallbackPromiseAdapter.h
diff --git a/Source/bindings/core/v8/CallbackPromiseAdapter.h b/Source/bindings/core/v8/CallbackPromiseAdapter.h
index af0f1486dd757c1d3978b4b6de71929ce481c098..9aace9ae4af8e63b71a330d81f5cde68e855993f 100644
--- a/Source/bindings/core/v8/CallbackPromiseAdapter.h
+++ b/Source/bindings/core/v8/CallbackPromiseAdapter.h
@@ -78,7 +78,7 @@ namespace blink {
 template<typename S, typename T>
 class CallbackPromiseAdapter FINAL : public blink::WebCallbacks<typename S::WebType, typename T::WebType> {
 public:
-    CallbackPromiseAdapter(PassRefPtr<ScriptPromiseResolver> resolver)
+    explicit CallbackPromiseAdapter(PassRefPtr<ScriptPromiseResolver> resolver)
         : m_resolver(resolver)
     {
         ASSERT(m_resolver);
@@ -108,6 +108,38 @@ private:
     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