Clean up V8ObjectConstructor

third_party/WebKit/Source/bindings/core/v8/V8ObjectConstructor.cpp

Index: third_party/WebKit/Source/bindings/core/v8/V8ObjectConstructor.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8ObjectConstructor.cpp b/third_party/WebKit/Source/bindings/core/v8/V8ObjectConstructor.cpp
index c7c9fe020f421caac35e574149fd3aa161026d00..9536093bf8465d4ed9b527387f9eb0882a96a270 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8ObjectConstructor.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/V8ObjectConstructor.cpp
@@ -25,40 +25,24 @@
 #include "bindings/core/v8/V8ObjectConstructor.h"
 
 #include "bindings/core/v8/V8Binding.h"
-#include "bindings/core/v8/V8ScriptRunner.h"
-#include "core/dom/Document.h"
-#include "core/frame/LocalFrame.h"
 #include "platform/instrumentation/tracing/TraceEvent.h"
 
 namespace blink {
 
 v8::MaybeLocal<v8::Object> V8ObjectConstructor::newInstance(
     v8::Isolate* isolate,
-    v8::Local<v8::Function> function) {
-  ASSERT(!function.IsEmpty());
-  ConstructorMode constructorMode(isolate);
-  return V8ScriptRunner::instantiateObject(isolate, function);
-}
-
-v8::MaybeLocal<v8::Object> V8ObjectConstructor::newInstance(
-    v8::Isolate* isolate,
     v8::Local<v8::Function> function,
     int argc,
     v8::Local<v8::Value> argv[]) {
   ASSERT(!function.IsEmpty());
+  TRACE_EVENT0("v8", "v8.newInstance");
   ConstructorMode constructorMode(isolate);
-  return V8ScriptRunner::instantiateObject(isolate, function, argc, argv);
-}
-
-v8::MaybeLocal<v8::Object> V8ObjectConstructor::newInstanceInDocument(
-    v8::Isolate* isolate,
-    v8::Local<v8::Function> function,
-    int argc,
-    v8::Local<v8::Value> argv[],
-    Document* document) {
-  ASSERT(!function.IsEmpty());
-  return V8ScriptRunner::instantiateObjectInDocument(isolate, function,
-                                                     document, argc, argv);
+  v8::MicrotasksScope microtasksScope(isolate,
+                                      v8::MicrotasksScope::kDoNotRunMicrotasks);
+  v8::MaybeLocal<v8::Object> result =
+      function->NewInstance(isolate->GetCurrentContext(), argc, argv);
+  CHECK(!isolate->IsDead());
+  return result;
 }
 
 void V8ObjectConstructor::isValidConstructorMode(