KT-3263 Add a quick fix to make a class inner

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

@@ -151,5 +151,7 @@ public class QuickFixes {
 
         factories.put(NO_TYPE_ARGUMENTS_ON_RHS_OF_IS_EXPRESSION, AddStarProjectionsFix.createFactoryForIsExpression());
         factories.put(WRONG_NUMBER_OF_TYPE_ARGUMENTS, AddStarProjectionsFix.createFactoryForJavaClass());
+
+        factories.put(INACCESSIBLE_OUTER_CLASS_EXPRESSION, AddModifierFix.createFactory(INNER_KEYWORD, JetClass.class));
     }
 }

idea/testData/quickfix/modifiers/afterAddInnerModifier.kt

@@ -0,0 +1,8 @@
+// "Add 'inner' modifier" "true"
+class A {
+    fun foo() = 42
+
+    inner class B {
+        fun bar() = <caret>foo()
+    }
+}

idea/testData/quickfix/modifiers/beforeAddInnerModifier.kt

@@ -0,0 +1,8 @@
+// "Add 'inner' modifier" "true"
+class A {
+    fun foo() = 42
+
+    class B {
+        fun bar() = <caret>foo()
+    }
+}