[inspector_protocol] Allow custom json parser.

lib/DispatcherBase_cpp.template

Index: lib/DispatcherBase_cpp.template
diff --git a/lib/DispatcherBase_cpp.template b/lib/DispatcherBase_cpp.template
index c4f36a5fd31b286d8c9ad99b328b65017571efa5..9095cbc961c7761406eb58c76264cf13e9b1f128 100644
--- a/lib/DispatcherBase_cpp.template
+++ b/lib/DispatcherBase_cpp.template
@@ -88,7 +88,7 @@ DispatcherBase::~DispatcherBase()
 // static
 bool DispatcherBase::getCommandName(const String& message, String* result)
 {
-    std::unique_ptr<protocol::Value> value = parseJSON(message);
+    std::unique_ptr<protocol::Value> value = StringUtil::parseJSON(message);
     if (!value)
         return false;