Fix a bug with mojom imports where 2 imports with the same namespace would

mojo/public/bindings/tests/sample_service_unittest.cc

Index: mojo/public/bindings/tests/sample_service_unittest.cc
diff --git a/mojo/public/bindings/tests/sample_service_unittest.cc b/mojo/public/bindings/tests/sample_service_unittest.cc
index 8045149e85e3d71d5332bd6d4a6fd229bf3ce327..f7d5a44685884b5e0ceb7197791f8765e2ed8f28 100644
--- a/mojo/public/bindings/tests/sample_service_unittest.cc
+++ b/mojo/public/bindings/tests/sample_service_unittest.cc
@@ -345,6 +345,9 @@ TEST(BindingsSampleTest, DefaultValues) {
 
   EXPECT_EQ(1u, full.shape_masks().size());
   EXPECT_EQ(1 << imported::SHAPE_RECTANGLE, full.shape_masks()[0]);
+
+  EXPECT_EQ(imported::SHAPE_RECTANGLE, full.thing().shape());
+  EXPECT_EQ(imported::COLOR_RED, full.thing().color());
 }
 
 }  // namespace sample