[inspector_protocol] Support chromium code style.

lib/ErrorSupport_cpp.template

 // Copyright 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 "ErrorSupport.h"
 
 {% for namespace in config.protocol.namespace %}
 namespace {{namespace}} {
 {% endfor %}
 
@@ skipping 24 matching lines @@
             builder.append('.');
         builder.append(m_path[i]);
     }
     builder.append(": ");
     builder.append(error);
     m_errors.push_back(builder.toString());
 }
 
 bool ErrorSupport::hasErrors()
 {
-    return m_errors.size();
+    return !!m_errors.size();
 }
 
 String ErrorSupport::errors()
 {
     StringBuilder builder;
     for (size_t i = 0; i < m_errors.size(); ++i) {
         if (i)
             builder.append("; ");
         builder.append(m_errors[i]);
     }
     return builder.toString();
 }
 
 {% for namespace in config.protocol.namespace %}
 } // namespace {{namespace}}
 {% endfor %}