[perf-prof] fix crash when logging.

src/objects.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/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <memory>
 #include <sstream>
@@ skipping 13587 matching lines @@
   GetPositionInfo(script, code_pos, &info, WITH_OFFSET);
   return info.line;
 }
 
 int Script::GetLineNumber(int code_pos) const {
   PositionInfo info;
   GetPositionInfo(code_pos, &info, WITH_OFFSET);
   return info.line;
 }
 
-Handle<Object> Script::GetNameOrSourceURL(Handle<Script> script) {
-  Isolate* isolate = script->GetIsolate();
-
+Object* Script::GetNameOrSourceURL() {
+  Isolate* isolate = GetIsolate();
   // Keep in sync with ScriptNameOrSourceURL in messages.js.
-
-  if (!script->source_url()->IsUndefined(isolate)) {
-    return handle(script->source_url(), isolate);
-  }
-  return handle(script->name(), isolate);
+  if (!source_url()->IsUndefined(isolate)) return source_url();
+  return name();
 }
 
 
 Handle<JSObject> Script::GetWrapper(Handle<Script> script) {
   Isolate* isolate = script->GetIsolate();
   if (!script->wrapper()->IsUndefined(isolate)) {
     DCHECK(script->wrapper()->IsWeakCell());
     Handle<WeakCell> cell(WeakCell::cast(script->wrapper()));
     if (!cell->cleared()) {
       // Return a handle for the existing script wrapper from the cache.
@@ skipping 6811 matching lines @@
       // depend on this.
       return DICTIONARY_ELEMENTS;
     }
     DCHECK_LE(kind, LAST_ELEMENTS_KIND);
     return kind;
   }
 }
 
 }  // namespace internal
 }  // namespace v8