[DevTools] Dispatch messages to V8InspectorSession directly.

third_party/WebKit/Source/platform/inspector_protocol/Frontend_cpp.template

 // This file is generated
 
 // Copyright (c) 2016 The Chromium 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 "platform/inspector_protocol/{{class_name}}.h"
 
 #include "platform/inspector_protocol/String16.h"
 
@@ skipping 26 matching lines @@
     {% for parameter in event.parameters %}
       {% if "optional" in parameter %}
     if ({{parameter.name}}.isJust())
         paramsObject->setValue("{{parameter.name}}", toValue({{parameter.name}}.fromJust()));
       {% else %}
     paramsObject->setValue("{{parameter.name}}", toValue({{resolve_type(parameter).to_raw_type % parameter.name}}));
       {% endif %}
     {% endfor %}
     jsonMessage->setObject("params", std::move(paramsObject));
     if (m_frontendChannel)
-        m_frontendChannel->sendProtocolNotification(std::move(jsonMessage));
+        m_frontendChannel->sendProtocolNotification(jsonMessage->toJSONString());
 }
   {% endfor %}
 {% endfor %}
 
 } // namespace protocol
 } // namespace blink