Replace //net TypeConverters with StructTraits.

net/net.gyp

Index: net/net.gyp
diff --git a/net/net.gyp b/net/net.gyp
index dfeee21b7b3152fa1872ef72eb823da3aeaa01df..53af1d2c6f75cc926ce0610608e1a9635463a3d8 100644
--- a/net/net.gyp
+++ b/net/net.gyp
@@ -919,12 +919,18 @@
           'sources': [
             'interfaces/host_resolver_service.mojom',
             'interfaces/proxy_resolver_service.mojom',
+            'dns/mojo_host_struct_traits.cc',
+            'dns/mojo_host_struct_traits.h',
+            'proxy/mojo_proxy_struct_traits.cc',
+            'proxy/mojo_proxy_struct_traits.h',
           ],
           'dependencies': [
             '../url/url.gyp:url_mojom',
           ],
           'variables': {
             'mojom_typemaps': [
+              'interfaces/host_resolver.typemap',
+              'interfaces/proxy_resolver.typemap',
               '../url/mojo/gurl.typemap',
             ],
           },
@@ -948,7 +954,6 @@
             'proxy/proxy_service_mojo.h',
           ],
           'dependencies': [
-            'mojo_type_converters',
             'net',
             'net_interfaces',
             '../mojo/mojo_base.gyp:mojo_common_lib',
@@ -976,28 +981,11 @@
             'proxy/mojo_proxy_resolver_v8_tracing_bindings.h',
           ],
           'dependencies': [
-            'mojo_type_converters',
             'net_interfaces',
             'net_with_v8',
             '../mojo/mojo_public.gyp:mojo_cpp_bindings',
           ],
         },
-        {
-          # GN version: //net:mojo_type_converters
-          'target_name': 'mojo_type_converters',
-          'type': 'static_library',
-          'sources': [
-            'dns/mojo_host_type_converters.cc',
-            'dns/mojo_host_type_converters.h',
-            'proxy/mojo_proxy_type_converters.cc',
-            'proxy/mojo_proxy_type_converters.h',
-          ],
-          'dependencies': [
-            'net',
-            'net_interfaces',
-            '../mojo/mojo_public.gyp:mojo_cpp_bindings',
-          ],
-        },
       ],
     }],
     ['OS != "ios" and OS != "android"', {