[runtime] Remove SharedFunctionInfo::is_function which is the inverse of SFI::is_toplevel

src/debug/debug-evaluate.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/debug/debug-evaluate.h"
 
 #include "src/accessors.h"
 #include "src/compiler.h"
 #include "src/contexts.h"
 #include "src/debug/debug-frames.h"
@@ skipping 201 matching lines @@
                                                    element.scope_info);
     }
   }
 }
 
 
 void DebugEvaluate::ContextBuilder::MaterializeArgumentsObject(
     Handle<JSObject> target, Handle<JSFunction> function) {
   // Do not materialize the arguments object for eval or top-level code.
   // Skip if "arguments" is already taken.
-  if (!function->shared()->is_function()) return;
+  if (function->shared()->is_toplevel()) return;
   Maybe<bool> maybe = JSReceiver::HasOwnProperty(
       target, isolate_->factory()->arguments_string());
   DCHECK(maybe.IsJust());
   if (maybe.FromJust()) return;
 
   // FunctionGetArguments can't throw an exception.
   Handle<JSObject> arguments = Accessors::FunctionGetArguments(function);
   Handle<String> arguments_str = isolate_->factory()->arguments_string();
   JSObject::SetOwnPropertyIgnoreAttributes(target, arguments_str, arguments,
                                            NONE)
@@ skipping 11 matching lines @@
     return;
   } else if (local_function->shared()->scope_info()->HasReceiver() &&
              !frame_->receiver()->IsTheHole(isolate_)) {
     recv = handle(frame_->receiver(), isolate_);
   }
   JSObject::SetOwnPropertyIgnoreAttributes(target, name, recv, NONE).Check();
 }
 
 }  // namespace internal
 }  // namespace v8