Revert of Do not eagerly instantiate accessors' JSFunction.

src/arguments.h

Index: src/arguments.h
diff --git a/src/arguments.h b/src/arguments.h
index 2311870326f6a4f696489ef43cd4e29bb0bfe8f0..42d444b20723df62c201bcaf1600bd5952a6ad5e 100644
--- a/src/arguments.h
+++ b/src/arguments.h
@@ -220,14 +220,17 @@
   static const int kCalleeIndex = T::kCalleeIndex;
   static const int kContextSaveIndex = T::kContextSaveIndex;
 
-  FunctionCallbackArguments(internal::Isolate* isolate, internal::Object* data,
-                            internal::HeapObject* callee,
-                            internal::Object* holder, internal::Object** argv,
-                            int argc, bool is_construct_call)
-      : Super(isolate),
-        argv_(argv),
-        argc_(argc),
-        is_construct_call_(is_construct_call) {
+  FunctionCallbackArguments(internal::Isolate* isolate,
+      internal::Object* data,
+      internal::JSFunction* callee,
+      internal::Object* holder,
+      internal::Object** argv,
+      int argc,
+      bool is_construct_call)
+        : Super(isolate),
+          argv_(argv),
+          argc_(argc),
+          is_construct_call_(is_construct_call) {
     Object** values = begin();
     values[T::kDataIndex] = data;
     values[T::kCalleeIndex] = callee;
@@ -239,8 +242,7 @@
     values[T::kReturnValueDefaultValueIndex] =
         isolate->heap()->the_hole_value();
     values[T::kReturnValueIndex] = isolate->heap()->the_hole_value();
-    DCHECK(values[T::kCalleeIndex]->IsJSFunction() ||
-           values[T::kCalleeIndex]->IsFunctionTemplateInfo());
+    DCHECK(values[T::kCalleeIndex]->IsJSFunction());
     DCHECK(values[T::kHolderIndex]->IsHeapObject());
     DCHECK(values[T::kIsolateIndex]->IsSmi());
   }