Avoid useless call to v8::Isolate::GetCurrent() in ScriptPromiseResolver

Source/bindings/v8/ScriptPromiseResolver.cpp

Index: Source/bindings/v8/ScriptPromiseResolver.cpp
diff --git a/Source/bindings/v8/ScriptPromiseResolver.cpp b/Source/bindings/v8/ScriptPromiseResolver.cpp
index 7440a418b8b34ca62031a95c4f1be814c9a218c4..6f0f00da1985b9b35266e40fa0d1db6a5d470382 100644
--- a/Source/bindings/v8/ScriptPromiseResolver.cpp
+++ b/Source/bindings/v8/ScriptPromiseResolver.cpp
@@ -65,8 +65,7 @@ PassRefPtr<ScriptPromiseResolver> ScriptPromiseResolver::create(ScriptExecutionC
 {
     ASSERT(v8::Context::InContext());
     ASSERT(context);
-    v8::Isolate* isolate = v8::Isolate::GetCurrent();
-    return adoptRef(new ScriptPromiseResolver(toV8Context(context, DOMWrapperWorld::current())->Global(), isolate));
+    return adoptRef(new ScriptPromiseResolver(toV8Context(context, DOMWrapperWorld::current())->Global(), toIsolate(context)));
 }
 
 PassRefPtr<ScriptPromiseResolver> ScriptPromiseResolver::create()