Issue 6201. Clean up to replace 'interface' with 'abstract class'

editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/cleanup/CleanUpRefactoringWizard.java

Index: editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/cleanup/CleanUpRefactoringWizard.java
diff --git a/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/cleanup/CleanUpRefactoringWizard.java b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/cleanup/CleanUpRefactoringWizard.java
index ae88e996e6ed371ed951394ffdbff0b9be4b0bde..7b86cee6c2e8b24a12e6bf469a57d9f3d441396a 100644
--- a/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/cleanup/CleanUpRefactoringWizard.java
+++ b/editor/tools/plugins/com.google.dart.tools.ui/src/com/google/dart/tools/ui/internal/cleanup/CleanUpRefactoringWizard.java
@@ -27,6 +27,7 @@ import com.google.dart.tools.ui.internal.cleanup.migration.Migrate_1M1_library_C
 import com.google.dart.tools.ui.internal.cleanup.migration.Migrate_1M1_optionalNamed_CleanUp;
 import com.google.dart.tools.ui.internal.cleanup.migration.Migrate_1M1_parseNum_CleanUp;
 import com.google.dart.tools.ui.internal.cleanup.migration.Migrate_1M1_rawString_CleanUp;
+import com.google.dart.tools.ui.internal.cleanup.migration.Migrate_1M2_removeInterface_CleanUp;
 import com.google.dart.tools.ui.internal.cleanup.migration.Migrate_1M2_renameTypes_CleanUp;
 import com.google.dart.tools.ui.internal.cleanup.migration.Migrate_1M2_toGetters_CleanUp;
 import com.google.dart.tools.ui.internal.cleanup.style.Style_trailingSpace_CleanUp;
@@ -42,6 +43,7 @@ import org.eclipse.swt.SWT;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Event;
+import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Listener;
 import org.eclipse.swt.widgets.TabFolder;
 import org.eclipse.swt.widgets.TabItem;
@@ -64,6 +66,7 @@ public class CleanUpRefactoringWizard extends RefactoringWizard {
     private static final String ID_MIGRATE_SYNTAX_1M1_OPTIONAL_NAMED = "migrateSyntax-1M1-optionalNamed-whereSure";
     private static final String ID_MIGRATE_SYNTAX_1M2_GETTERS = "migrateSyntax-1M2-getters";
     private static final String ID_MIGRATE_SYNTAX_1M2_RENAME_TYPES = "migrateSyntax-1M2-renameExceptions";
+    private static final String ID_MIGRATE_SYNTAX_1M2_REMOVE_INTERFACE = "migrateSyntax-1M2-removeInterface";
 
     private static final String ID_STYLE_TRAILING_WHITESPACE = "style-trailingWhitespace";
     private static final String ID_STYLE_USE_BLOCKS = "style-useBlocks";
@@ -80,6 +83,9 @@ public class CleanUpRefactoringWizard extends RefactoringWizard {
       CLEAN_UPS.put(ID_MIGRATE_SYNTAX_1M1_OPTIONAL_NAMED, new Migrate_1M1_optionalNamed_CleanUp());
       CLEAN_UPS.put(ID_MIGRATE_SYNTAX_1M2_GETTERS, new Migrate_1M2_toGetters_CleanUp());
       CLEAN_UPS.put(ID_MIGRATE_SYNTAX_1M2_RENAME_TYPES, new Migrate_1M2_renameTypes_CleanUp());
+      CLEAN_UPS.put(
+          ID_MIGRATE_SYNTAX_1M2_REMOVE_INTERFACE,
+          new Migrate_1M2_removeInterface_CleanUp());
       settings.setDefault(ID_MIGRATE_SYNTAX_1M1_CATCH, true);
       settings.setDefault(ID_MIGRATE_SYNTAX_1M1_GET, true);
       settings.setDefault(ID_MIGRATE_SYNTAX_1M1_RAW_STRING, true);
@@ -89,6 +95,7 @@ public class CleanUpRefactoringWizard extends RefactoringWizard {
       settings.setDefault(ID_MIGRATE_SYNTAX_1M1_OPTIONAL_NAMED, false);
       settings.setDefault(ID_MIGRATE_SYNTAX_1M2_GETTERS, false);
       settings.setDefault(ID_MIGRATE_SYNTAX_1M2_RENAME_TYPES, false);
+      settings.setDefault(ID_MIGRATE_SYNTAX_1M2_REMOVE_INTERFACE, false);
       // style
       CLEAN_UPS.put(ID_STYLE_TRAILING_WHITESPACE, new Style_trailingSpace_CleanUp());
       CLEAN_UPS.put(ID_STYLE_USE_BLOCKS, new Style_useBlocks_CleanUp());
@@ -167,8 +174,12 @@ public class CleanUpRefactoringWizard extends RefactoringWizard {
                 syntaxComposite,
                 ID_MIGRATE_SYNTAX_1M2_RENAME_TYPES,
                 "Migrate to 1.0 M2 type names");
-//            new Label(syntaxComposite, SWT.NONE);
-//            new Label(syntaxComposite, SWT.NONE).setText("Work in progress... not fully implemented:");
+            new Label(syntaxComposite, SWT.NONE);
+            new Label(syntaxComposite, SWT.NONE).setText("Work in progress... not fully implemented:");
+            createCheckButton(
+                syntaxComposite,
+                ID_MIGRATE_SYNTAX_1M2_REMOVE_INTERFACE,
+                "Replace 'interface' with 'abstract class'");
           }
         }
         // Code Style