D8 should send idle notification even after the last run.

src/d8.cc

 // Copyright 2012 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.
 
 
 // Defined when linking against shared lib on Windows.
 #if defined(USING_V8_SHARED) && !defined(V8_SHARED)
 #define V8_SHARED
 #endif
 
@@ skipping 1327 matching lines @@
 
 int Shell::RunMain(Isolate* isolate, int argc, char* argv[]) {
 #ifndef V8_SHARED
   for (int i = 1; i < options.num_isolates; ++i) {
     options.isolate_sources[i].StartExecuteInThread();
   }
 #endif  // !V8_SHARED
   {
     HandleScope scope(isolate);
     Local<Context> context = CreateEvaluationContext(isolate);
-    if (options.last_run) {
+    if (options.last_run && options.interactive_shell) {
       // Keep using the same context in the interactive shell.
       evaluation_context_.Reset(isolate, context);
 #ifndef V8_SHARED
       // If the interactive debugger is enabled make sure to activate
       // it before running the files passed on the command line.
       if (i::FLAG_debugger) {
         InstallUtilityScript(isolate);
       }
 #endif  // !V8_SHARED
     }
     {
       Context::Scope cscope(context);
       PerIsolateData::RealmScope realm_scope(PerIsolateData::Get(isolate));
       options.isolate_sources[0].Execute(isolate);
     }
   }
-  if (!options.last_run) {
-    if (options.send_idle_notification) {
-      const int kLongIdlePauseInMs = 1000;
-      V8::ContextDisposedNotification();
-      V8::IdleNotification(kLongIdlePauseInMs);
-    }
+  if (options.send_idle_notification) {
+    const int kLongIdlePauseInMs = 1000;
+    V8::ContextDisposedNotification();
+    V8::IdleNotification(kLongIdlePauseInMs);
   }
 
 #ifndef V8_SHARED
   for (int i = 1; i < options.num_isolates; ++i) {
     options.isolate_sources[i].WaitForThread();
   }
 #endif  // !V8_SHARED
   return 0;
 }
 
@@ skipping 164 matching lines @@
 }
 
 }  // namespace v8
 
 
 #ifndef GOOGLE3
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }
 #endif