Mojo cpp bindings: validation logic for incoming messages

mojo/mojo_public.gypi

 {
   'targets': [
     {
       'target_name': 'mojo_system',
       'type': 'static_library',
       'defines': [
         'MOJO_SYSTEM_IMPLEMENTATION',
       ],
       'include_dirs': [
         '..',
@@ skipping 114 matching lines @@
         '../testing/gtest.gyp:gtest',
         'mojo_cpp_bindings',
         'mojo_environment_standalone',
         'mojo_public_test_utils',
         'mojo_run_all_unittests',
         'mojo_public_test_interfaces',
         'mojo_utility',
       ],
       'sources': [
         'public/cpp/bindings/tests/array_unittest.cc',
+        'public/cpp/bindings/tests/bounds_checker_unittest.cc',
         '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',
@@ skipping 91 matching lines @@
         'public/cpp/bindings/no_interface.h',
         'public/cpp/bindings/string.h',
         'public/cpp/bindings/sync_dispatcher.h',
         'public/cpp/bindings/type_converter.h',
         'public/cpp/bindings/lib/array_internal.h',
         'public/cpp/bindings/lib/array_internal.cc',
         'public/cpp/bindings/lib/array_serialization.h',
         'public/cpp/bindings/lib/bindings_internal.h',
         'public/cpp/bindings/lib/bindings_serialization.cc',
         'public/cpp/bindings/lib/bindings_serialization.h',
+        'public/cpp/bindings/lib/bounds_checker.cc',
+        'public/cpp/bindings/lib/bounds_checker.h',
         'public/cpp/bindings/lib/buffer.h',
         'public/cpp/bindings/lib/callback_internal.h',
         'public/cpp/bindings/lib/connector.cc',
         'public/cpp/bindings/lib/connector.h',
         'public/cpp/bindings/lib/filter_chain.cc',
         'public/cpp/bindings/lib/filter_chain.h',
         'public/cpp/bindings/lib/fixed_buffer.cc',
         'public/cpp/bindings/lib/fixed_buffer.h',
         'public/cpp/bindings/lib/interface_impl_internal.h',
         'public/cpp/bindings/lib/interface_ptr_internal.h',
@@ skipping 167 matching lines @@
           },
           'dependencies': [
             'mojo_public_java',
           ],
           'includes': [ '../build/java.gypi' ],
         },
       ],
     }],
   ],
 }