Do not eagerly instantiate accessors' JSFunction.

src/arguments.h

Index: src/arguments.h
diff --git a/src/arguments.h b/src/arguments.h
index 481c1ca5e67bdcabc5e91b5068539e73ddd710a2..24720566906c84c3071103106526bb4f71c57e54 100644
--- a/src/arguments.h
+++ b/src/arguments.h
@@ -218,17 +218,14 @@ class FunctionCallbackArguments
   static const int kCalleeIndex = T::kCalleeIndex;
   static const int kContextSaveIndex = T::kContextSaveIndex;
 
-  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) {
+  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) {
     Object** values = begin();
     values[T::kDataIndex] = data;
     values[T::kCalleeIndex] = callee;
@@ -240,7 +237,8 @@ class FunctionCallbackArguments
     values[T::kReturnValueDefaultValueIndex] =
         isolate->heap()->the_hole_value();
     values[T::kReturnValueIndex] = isolate->heap()->the_hole_value();
-    DCHECK(values[T::kCalleeIndex]->IsJSFunction());
+    DCHECK(values[T::kCalleeIndex]->IsJSFunction() ||
+           values[T::kCalleeIndex]->IsFunctionTemplateInfo());
     DCHECK(values[T::kHolderIndex]->IsHeapObject());
     DCHECK(values[T::kIsolateIndex]->IsSmi());
   }