[V8] Unify get function name for debugging purpose

src/messages.cc

 // Copyright 2011 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/messages.h"
 
 #include "src/api.h"
 #include "src/execution.h"
 #include "src/isolate-inl.h"
 #include "src/string-builder.h"
@@ skipping 150 matching lines @@
 Handle<Object> CallSite::GetFileName() {
   Handle<Object> script(fun_->shared()->script(), isolate_);
   if (script->IsScript()) {
     return Handle<Object>(Handle<Script>::cast(script)->name(), isolate_);
   }
   return isolate_->factory()->null_value();
 }
 
 
 Handle<Object> CallSite::GetFunctionName() {
-  Handle<String> result = JSFunction::GetDebugName(fun_);
+  Handle<String> result = JSFunction::GetName(fun_);
   if (result->length() != 0) return result;
+
   Handle<Object> script(fun_->shared()->script(), isolate_);
   if (script->IsScript() &&
       Handle<Script>::cast(script)->compilation_type() ==
           Script::COMPILATION_TYPE_EVAL) {
     return isolate_->factory()->eval_string();
   }
   return isolate_->factory()->null_value();
 }
 
 
@@ skipping 291 matching lines @@
   if (obj->IsUndefined()) return default_value;
   if (!obj->IsString()) {
     ASSIGN_RETURN_ON_EXCEPTION(isolate, obj, Object::ToString(isolate, obj),
                                String);
   }
   return Handle<String>::cast(obj);
 }
 
 }  // namespace internal
 }  // namespace v8