Add removeAbstractModifier Fix

Still need to add localization strings

Jakefile.js

@@ -173,7 +173,8 @@ var servicesSources = [
     "codeFixes/fixClassIncorrectlyImplementsInterface.ts",
     "codeFixes/fixClassDoesntImplementInheritedAbstractMember.ts",
     "codeFixes/fixClassSuperMustPrecedeThisAccess.ts",
-    "codeFixes/fixConstructorForDerivedNeedSuperCall.ts"
+    "codeFixes/fixConstructorForDerivedNeedSuperCall.ts",
+    "codeFixes/fixRemoveAbstractModifierInNonAbstractClass.ts"
 ].map(function (f) {
     return path.join(servicesDirectory, f);
 }));

src/services/codefixes/fixRemoveAbstractModifierInNonAbstractClass.ts

@@ -0,0 +1,42 @@
+/* @internal */
+namespace ts.codefix {
+    registerCodeFix({
+        errorCodes: [Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class.code],
+        getCodeActions: (context: CodeFixContext) => {
+            const sourceFile = context.sourceFile;
+            const start = context.span.start;
+            const token = getTokenAtPosition(sourceFile, start);
+
+            Debug.assert(token.kind === SyntaxKind.AbstractKeyword);
+
+            const propertyDeclaration = <PropertyDeclaration>token.parent;
+            const classDeclaration = <ClassDeclaration>propertyDeclaration.parent;
+            const classKeywordStart = classDeclaration.getChildren()[0].getStart();
+
+            let codeFix: CodeAction[] = [
+                {
+                    description: `Remove abstract modifier from ${propertyDeclaration.name.getText()}.`,
+                    changes: [{
+                        fileName: sourceFile.fileName,
+                        textChanges: [{
+                            span: {start: start, length: context.span.length + /*space*/ 1},
+                            newText: ""
+                        }]
+                    }]
+                },
+                {
+                    description: `Make class ${classDeclaration.name.getText()} abstract.`,
+                    changes: [{
+                        fileName: sourceFile.fileName,
+                        textChanges: [{
+                            span: { start: classKeywordStart, length: 0 },
+                            newText: "abstract "
+                        }]
+                    }]
+                }
+            ];
+
+            return codeFix;
+        }
+    });
+}

src/services/codefixes/fixes.ts

@@ -2,4 +2,5 @@
 /// <reference path="fixClassDoesntImplementInheritedAbstractMember.ts" />
 /// <reference path="fixClassSuperMustPrecedeThisAccess.ts" />
 /// <reference path="fixConstructorForDerivedNeedSuperCall.ts" />
-/// <reference path="fixExtendsInterfaceBecomesImplements.ts" />
+/// <reference path="fixExtendsInterfaceBecomesImplements.ts" />
+/// <reference path="fixRemoveAbstractModifierInNonAbstractClass.ts" />