[inspector] added reconnect method for tests

src/inspector/v8-runtime-agent-impl.cc

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 503 matching lines @@
 }
 
 Response V8RuntimeAgentImpl::runIfWaitingForDebugger() {
   m_inspector->client()->runIfWaitingForDebugger(m_session->contextGroupId());
   return Response::OK();
 }
 
 Response V8RuntimeAgentImpl::setCustomObjectFormatterEnabled(bool enabled) {
   m_state->setBoolean(V8RuntimeAgentImplState::customObjectFormatterEnabled,
                       enabled);
+  if (!m_enabled) return Response::Error("Runtime agent is not enabled");
   m_session->setCustomObjectFormatterEnabled(enabled);
   return Response::OK();
 }
 
 Response V8RuntimeAgentImpl::discardConsoleEntries() {
   V8ConsoleMessageStorage* storage =
       m_inspector->ensureConsoleMessageStorage(m_session->contextGroupId());
   storage->clear();
   return Response::OK();
 }
@@ skipping 137 matching lines @@
   }
   return Response::OK();
 }
 
 Response V8RuntimeAgentImpl::disable() {
   if (!m_enabled) return Response::OK();
   m_enabled = false;
   m_state->setBoolean(V8RuntimeAgentImplState::runtimeEnabled, false);
   m_inspector->disableStackCapturingIfNeeded();
   m_session->discardInjectedScripts();
+  m_session->setCustomObjectFormatterEnabled(false);
   reset();
   m_inspector->client()->endEnsureAllContextsInGroup(
       m_session->contextGroupId());
   return Response::OK();
 }
 
 void V8RuntimeAgentImpl::reset() {
   m_compiledScripts.clear();
   if (m_enabled) {
     if (const V8InspectorImpl::ContextByIdMap* contexts =
@@ skipping 40 matching lines @@
 }
 
 bool V8RuntimeAgentImpl::reportMessage(V8ConsoleMessage* message,
                                        bool generatePreview) {
   message->reportToFrontend(&m_frontend, m_session, generatePreview);
   m_frontend.flush();
   return m_inspector->hasConsoleMessageStorage(m_session->contextGroupId());
 }
 
 }  // namespace v8_inspector