Supported Kotlin in Java's automatic parameter renamer.

compiler/light-classes/src/org/jetbrains/kotlin/asJava/KotlinLightMethodForDeclaration.kt

@@ -65,7 +65,7 @@ open public class KotlinLightMethodForDeclaration(
         }, false)
     }
 
-    override fun getNavigationElement(): PsiElement = origin
+    override fun getNavigationElement(): PsiElement = getOrigin()
     override fun getOriginalElement(): PsiElement = origin
 
     override fun getDelegate(): PsiMethod = delegate

compiler/light-classes/src/org/jetbrains/kotlin/asJava/KotlinLightParameter.java

@@ -17,13 +17,12 @@
 package org.jetbrains.kotlin.asJava;
 
 import com.intellij.lang.Language;
-import com.intellij.psi.PsiAnnotationOwner;
-import com.intellij.psi.PsiFile;
-import com.intellij.psi.PsiModifierList;
-import com.intellij.psi.PsiParameter;
+import com.intellij.psi.*;
 import com.intellij.psi.search.GlobalSearchScope;
 import com.intellij.psi.search.SearchScope;
 import com.intellij.util.ArrayUtil;
+import com.intellij.util.IncorrectOperationException;
+import org.jetbrains.annotations.NonNls;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.kotlin.idea.JetLanguage;
@@ -103,6 +102,22 @@ public class KotlinLightParameter extends LightParameter implements KotlinLightE
         return setter != null ? setter.getParameter() : null;
     }
 
+    @NotNull
+    @Override
+    public PsiElement getNavigationElement() {
+        JetParameter origin = getOrigin();
+        return origin != null ? origin : super.getNavigationElement();
+    }
+
+    @Override
+    public PsiElement setName(@NonNls @NotNull String name) throws IncorrectOperationException {
+        JetParameter origin = getOrigin();
+        if (origin != null) {
+            origin.setName(name);
+        }
+        return this;
+    }
+
     @Override
     public PsiFile getContainingFile() {
         JetDeclaration declaration = method.getOrigin();