Add RequireMarkImplementor to ConformanceRules.
It is possible for a JS class to extend a j2cl transpiled interface, in such cases we would like to ensure that such classes call the "$markImplementor" method to register itself as an implementor of the interface.
@@ -31,6 +31,8 @@ import com.google.common.reflect.TypeToken;
import com.google.javascript.jscomp.CheckConformance.InvalidRequirementSpec;
import com.google.javascript.jscomp.CheckConformance.Rule;
import com.google.javascript.jscomp.CodingConvention.AssertionFunctionSpec;
+import com.google.javascript.jscomp.ConformanceRules.AbstractRule;
+import com.google.javascript.jscomp.ConformanceRules.ConformanceResult;
import com.google.javascript.jscomp.Requirement.Type;
import com.google.javascript.jscomp.parsing.JsDocInfoParser;
import com.google.javascript.rhino.FunctionTypeI;
