Mojo C++ bindings: assume that all imported mojoms have the same variant as current mojom

mojo/public/interfaces/bindings/tests/test_variant_import.mojom

Index: mojo/public/interfaces/bindings/tests/test_variant_import.mojom
diff --git a/gpu/command_buffer/common/capabilities.mojom b/mojo/public/interfaces/bindings/tests/test_variant_import.mojom
similarity index 75%
copy from gpu/command_buffer/common/capabilities.mojom
copy to mojo/public/interfaces/bindings/tests/test_variant_import.mojom
index fd35409e940e193377d9411c182e99746220f2a7..1c7a7830f35941437a6bd2c3f9734c5f226c4786 100644
--- a/gpu/command_buffer/common/capabilities.mojom
+++ b/mojo/public/interfaces/bindings/tests/test_variant_import.mojom
@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-module gpu.mojom;
+module mojo.test.test_import;
 
-[Native]
-struct Capabilities;
+struct ImportedType {};