Deprecate Math object in corelib in favor of dart:math library.

lib/compiler/implementation/tree/nodes.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.
 
 interface Visitor<R> {
   R visitBlock(Block node);
   R visitBreakStatement(BreakStatement node);
   R visitCascade(Cascade node);
   R visitCascadeReceiver(CascadeReceiver node);
   R visitCaseMatch(CaseMatch node);
@@ skipping 644 matching lines @@
 
 class LiteralInt extends Literal<int> {
   LiteralInt(Token token, DecodeErrorHandler handler) : super(token, handler);
 
   LiteralInt asLiteralInt() => this;
 
   int get value() {
     try {
       Token valueToken = token;
       if (valueToken.kind === PLUS_TOKEN) valueToken = valueToken.next;
-      return Math.parseInt(valueToken.value.slowToString());
+      return parseInt(valueToken.value.slowToString());
     } catch (FormatException ex) {
       (this.handler)(token, ex);
     }
   }
 
   accept(Visitor visitor) => visitor.visitLiteralInt(this);
 }
 
 class LiteralDouble extends Literal<double> {
   LiteralDouble(Token token, DecodeErrorHandler handler)
     : super(token, handler);
 
   LiteralDouble asLiteralDouble() => this;
 
   double get value() {
     try {
       Token valueToken = token;
       if (valueToken.kind === PLUS_TOKEN) valueToken = valueToken.next;
-      return Math.parseDouble(valueToken.value.slowToString());
+      return parseDouble(valueToken.value.slowToString());
     } catch (FormatException ex) {
       (this.handler)(token, ex);
     }
   }
 
   accept(Visitor visitor) => visitor.visitLiteralDouble(this);
 }
 
 class LiteralBool extends Literal<bool> {
   LiteralBool(Token token, DecodeErrorHandler handler) : super(token, handler);
@@ skipping 1059 matching lines @@
  * argument).
  *
  * TODO(ahe): This method is controversial, the team needs to discuss
  * if top-level methods are acceptable and what naming conventions to
  * use.
  */
 initializerDo(Node node, f(Node node)) {
   SendSet send = node.asSendSet();
   if (send !== null) return f(send.arguments.head);
 }