Implement FetchEvent.navigationPreload

third_party/WebKit/Source/bindings/core/v8/V8Binding.h

Index: third_party/WebKit/Source/bindings/core/v8/V8Binding.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8Binding.h b/third_party/WebKit/Source/bindings/core/v8/V8Binding.h
index 81518f79b0f6221e457b7c6d0a045e442219063f..ccc17c256a1d786c949178f2de173c5076d744d7 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8Binding.h
+++ b/third_party/WebKit/Source/bindings/core/v8/V8Binding.h
@@ -371,6 +371,13 @@ inline void v8SetReturnValueFast(const CallbackInfo& callbackInfo,
   v8SetReturnValueFast(callbackInfo, impl.get(), wrappable);
 }
 
+template <typename CallbackInfo, typename Wrappable>
+inline void v8SetReturnValueFast(const CallbackInfo& callbackInfo,
+                                 blink::ScriptPromise promise,
+                                 const Wrappable* wrappable) {
+  v8SetReturnValue(callbackInfo, promise.v8Value());
+}
+
 // Convert v8::String to a WTF::String. If the V8 string is not already
 // an external string then it is transformed into an external string at this
 // point to avoid repeated conversions.