Added quickfix for VAR_OVERRIDDEN_BY_VAL.

idea/src/org/jetbrains/jet/plugin/quickfix/QuickFixes.java

@@ -144,6 +144,7 @@ public class QuickFixes {
         ChangeVariableMutabilityFix changeVariableMutabilityFix = new ChangeVariableMutabilityFix();
         actions.put(VAL_WITH_SETTER, changeVariableMutabilityFix);
         actions.put(VAL_REASSIGNMENT, changeVariableMutabilityFix);
+        actions.put(VAR_OVERRIDDEN_BY_VAL, changeVariableMutabilityFix);
 
         actions.put(UNNECESSARY_SAFE_CALL, ReplaceCallFix.toDotCallFromSafeCall());
         actions.put(UNSAFE_CALL, ReplaceCallFix.toSafeCall());

idea/testData/quickfix/variables/changeMutability/afterValOverrideVar.kt

@@ -0,0 +1,8 @@
+// "Make variable mutable" "true"
+open class A {
+    open var x = 42;
+}
+
+class B : A() {
+    override var x: Int = 3;
+}

idea/testData/quickfix/variables/changeMutability/beforeValOverrideVar.kt

@@ -0,0 +1,8 @@
+// "Make variable mutable" "true"
+open class A {
+    open var x = 42;
+}
+
+class B : A() {
+    override val<caret> x: Int = 3;
+}

idea/tests/org/jetbrains/jet/plugin/quickfix/QuickFixTestGenerated.java

@@ -746,6 +746,11 @@ public class QuickFixTestGenerated extends AbstractQuickFixTest {
                 JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), "org.jetbrains.jet.generators.tests.GenerateTests", new File("idea/testData/quickfix/variables/changeMutability"), Pattern.compile("^before(\\w+)\\.kt$"), true);
             }
             
+            @TestMetadata("beforeValOverrideVar.kt")
+            public void testValOverrideVar() throws Exception {
+                doTest("idea/testData/quickfix/variables/changeMutability/beforeValOverrideVar.kt");
+            }
+            
             @TestMetadata("beforeValReassignmentLocal.kt")
             public void testValReassignmentLocal() throws Exception {
                 doTest("idea/testData/quickfix/variables/changeMutability/beforeValReassignmentLocal.kt");