allow empty classes to be generated

source/ChromeDevTools/Protocol/Chrome/Network/Headers.cs

+using MasterDevs.ChromeDevTools;
+using Newtonsoft.Json;
+using System.Collections.Generic;
+
+namespace MasterDevs.ChromeDevTools.Protocol.Chrome.Network
+{
+	/// <summary>
+	/// Request / response headers as keys / values of JSON object.
+	/// </summary>
+	[SupportedBy("Chrome")]
+	public class Headers
+	{
+	}
+}

source/ChromeDevTools/Protocol/Chrome/Tracing/MemoryDumpConfig.cs

+using MasterDevs.ChromeDevTools;
+using Newtonsoft.Json;
+using System.Collections.Generic;
+
+namespace MasterDevs.ChromeDevTools.Protocol.Chrome.Tracing
+{
+	/// <summary>
+	/// Configuration for memory dump. Used only when "memory-infra" category is enabled.
+	/// </summary>
+	[SupportedBy("Chrome")]
+	public class MemoryDumpConfig
+	{
+	}
+}

source/ChromeDevTools/Protocol/iOS/Network/Headers.cs

+using MasterDevs.ChromeDevTools;
+using Newtonsoft.Json;
+using System.Collections.Generic;
+
+namespace MasterDevs.ChromeDevTools.Protocol.iOS.Network
+{
+	/// <summary>
+	/// Request / response headers as keys / values of JSON object.
+	/// </summary>
+	[SupportedBy("iOS")]
+	public class Headers
+	{
+	}
+}

source/ProtocolGenerator/Program.cs

@@ -331,7 +331,8 @@ namespace MasterDevs.ChromeDevTools.ProtocolGenerator
         {
             if (null == type) return;
             if (type.Enum.Any()) WriteTypeEnum(domainDirectoryInfo, ns, type);
-            if (type.Properties.Any()) WriteTypeClass(domainDirectoryInfo, ns, type);
+            /*if (type.Properties.Any())*/
+            WriteTypeClass(domainDirectoryInfo, ns, type);
             WriteTypeSimple(domainDirectoryInfo, type);
         }