Add input data parser for Mojo message validation tests.

mojo/mojo_public.gypi

 {
   'targets': [
     {
       'target_name': 'mojo_system',
       'type': 'static_library',
       'defines': [
         'MOJO_SYSTEM_IMPLEMENTATION',
       ],
       'include_dirs': [
         '..',
@@ skipping 125 matching lines @@
         'public/cpp/bindings/tests/buffer_unittest.cc',
         'public/cpp/bindings/tests/connector_unittest.cc',
         'public/cpp/bindings/tests/handle_passing_unittest.cc',
         'public/cpp/bindings/tests/interface_ptr_unittest.cc',
         'public/cpp/bindings/tests/request_response_unittest.cc',
         'public/cpp/bindings/tests/router_unittest.cc',
         'public/cpp/bindings/tests/sample_service_unittest.cc',
         'public/cpp/bindings/tests/string_unittest.cc',
         'public/cpp/bindings/tests/struct_unittest.cc',
         'public/cpp/bindings/tests/type_conversion_unittest.cc',
+        'public/cpp/bindings/tests/validation_test_input_parser.cc',
+        'public/cpp/bindings/tests/validation_test_input_parser.h',
         'public/cpp/bindings/tests/validation_unittest.cc',
       ],
     },
     {
       'target_name': 'mojo_public_environment_unittests',
       'type': 'executable',
       'dependencies': [
         '../base/base.gyp:base',
         '../testing/gtest.gyp:gtest',
         'mojo_environment_standalone',
@@ skipping 272 matching lines @@
           },
           'dependencies': [
             'mojo_public_java',
           ],
           'includes': [ '../build/java.gypi' ],
         },
       ],
     }],
   ],
 }