Do not try to make object's containing class abstract #KT-11466 Fixed

idea/src/org/jetbrains/kotlin/idea/quickfix/QuickFixRegistrar.kt

@@ -37,6 +37,7 @@ import org.jetbrains.kotlin.idea.quickfix.replaceWith.DeprecatedSymbolUsageInWho
 import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.lexer.KtTokens.*
 import org.jetbrains.kotlin.psi.KtClass
+import org.jetbrains.kotlin.psi.KtClassOrObject
 import org.jetbrains.kotlin.psi.KtProperty
 import org.jetbrains.kotlin.resolve.jvm.diagnostics.ErrorsJvm
 import org.jetbrains.kotlin.resolve.jvm.diagnostics.ErrorsJvm.NO_REFLECTION_IN_CLASS_PATH
@@ -71,7 +72,7 @@ class QuickFixRegistrar : QuickFixContributor {
         MUST_BE_INITIALIZED_OR_BE_ABSTRACT.registerFactory(InitializePropertyQuickFixFactory)
         MUST_BE_INITIALIZED.registerFactory(InitializePropertyQuickFixFactory)
 
-        val addAbstractToClassFactory = AddModifierFix.createFactory(ABSTRACT_KEYWORD, KtClass::class.java)
+        val addAbstractToClassFactory = AddModifierFix.createFactory(ABSTRACT_KEYWORD, KtClassOrObject::class.java)
         ABSTRACT_PROPERTY_IN_NON_ABSTRACT_CLASS.registerFactory(removeAbstractModifierFactory, addAbstractToClassFactory)
 
         ABSTRACT_FUNCTION_IN_NON_ABSTRACT_CLASS.registerFactory(removeAbstractModifierFactory, addAbstractToClassFactory)

idea/testData/quickfix/abstract/abstractPropertyInCompanionObject.kt

@@ -0,0 +1,10 @@
+// "Make 'Owner' abstract" "false"
+// ERROR: Abstract property 'x' in non-abstract class 'Companion'
+// ACTION: Make 'x' not abstract
+// ACTION: Make internal
+
+class Owner {
+    companion object {
+        <caret>abstract val x: Int
+    }
+}

idea/tests/org/jetbrains/kotlin/idea/quickfix/QuickFixTestGenerated.java

@@ -75,6 +75,12 @@ public class QuickFixTestGenerated extends AbstractQuickFixTest {
             doTest(fileName);
         }
 
+        @TestMetadata("abstractPropertyInCompanionObject.kt")
+        public void testAbstractPropertyInCompanionObject() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/quickfix/abstract/abstractPropertyInCompanionObject.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("abstractPropertyInNonAbstractClass1.kt")
         public void testAbstractPropertyInNonAbstractClass1() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/quickfix/abstract/abstractPropertyInNonAbstractClass1.kt");