Change core lib, dart2js, and more for new optional parameters syntax

lib/compiler/implementation/ssa/codegen.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class SsaCodeGeneratorTask extends CompilerTask {
 
   final JavaScriptBackend backend;
 
   SsaCodeGeneratorTask(JavaScriptBackend backend)
       : this.backend = backend,
@@ skipping 2221 matching lines @@
     checkTypeOf(input, '===', 'function');
     js.Expression functionTest = pop();
     checkObject(input, '===');
     js.Expression objectTest = pop();
     checkType(input, type);
     push(new js.Binary('||',
                        functionTest,
                        new js.Binary('&&', objectTest, pop())));
   }
 
-  void checkType(HInstruction input, DartType type, [bool negative = false]) {
+  void checkType(HInstruction input, DartType type, {bool negative: false}) {
     world.registerIsCheck(type);
     Element element = type.element;
     use(input);
     js.PropertyAccess field =
         new js.PropertyAccess.field(pop(), backend.namer.operatorIs(element));
     if (backend.emitter.nativeEmitter.requiresNativeIsCheck(element)) {
       push(new js.Call(field, <js.Expression>[]));
       if (negative) push(new js.Prefix('!', pop()));
     } else {
       // We always negate at least once so that the result is boolified.
@@ skipping 737 matching lines @@
   if (leftType.canBeNull() && rightType.canBeNull()) {
     if (left.isConstantNull() || right.isConstantNull() ||
         (leftType.isPrimitive() && leftType == rightType)) {
       return '==';
     }
     return null;
   } else {
     return '===';
   }
 }