Enumerate the return value of dispatchEvent so it is clear.

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

Index: third_party/WebKit/Source/bindings/core/v8/RejectedPromises.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/RejectedPromises.cpp b/third_party/WebKit/Source/bindings/core/v8/RejectedPromises.cpp
index 03638df9e8668fb6f483dbc8efd9d4f12e8aa42c..55c3276ad4e89de0b8919b069100da9817fbe842 100644
--- a/third_party/WebKit/Source/bindings/core/v8/RejectedPromises.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/RejectedPromises.cpp
@@ -75,8 +75,8 @@ public:
             init.setReason(ScriptValue(m_scriptState, reason));
             init.setCancelable(true);
             RefPtrWillBeRawPtr<PromiseRejectionEvent> event = PromiseRejectionEvent::create(m_scriptState, EventTypeNames::unhandledrejection, init);
-            // Log to console if event was not preventDefault()'ed.
-            m_shouldLogToConsole = target->dispatchEvent(event);
+            // Log to console if event was not handled.
+            m_shouldLogToConsole = target->dispatchEvent(event) == WebInputEventResult::NotHandled;
         }
 
         if (m_shouldLogToConsole) {