Move Rectangle and Point into dart:math.

tools/dom/templates/html/dart2js/html_dart2js.darttemplate

 // 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.
 
 // DO NOT EDIT - unless you are editing documentation as per:
 // https://code.google.com/p/dart/wiki/ContributingHTMLDocumentation
 // Auto-generated dart:html library.
 
 /**
  * HTML elements and other resources for web-based applications that need to
@@ skipping 38 matching lines @@
 import 'dart:_js_helper' show
     convertDartClosureToJS, Creates, JavaScriptIndexingBehavior,
     JSName, Null, Returns,
     findDispatchTagForInterceptorClass, setNativeSubclassDispatchRecord;
 import 'dart:_interceptors' show
     Interceptor, JSExtendableArray, findInterceptorConstructorForType,
     getNativeInterceptor;
 import 'dart:_isolate_helper' show IsolateNatives;
 import 'dart:_foreign_helper' show JS;
 
+export 'dart:math' show Rectangle, Point;
+
 $!GENERATED_DART_FILES
 
 part '$AUXILIARY_DIR/AttributeMap.dart';
 part '$AUXILIARY_DIR/CanvasImageSource.dart';
 part '$AUXILIARY_DIR/CrossFrameTypes.dart';
 part '$AUXILIARY_DIR/CssClassSet.dart';
 part '$AUXILIARY_DIR/CssRectangle.dart';
 part '$AUXILIARY_DIR/Dimension.dart';
 part '$AUXILIARY_DIR/EventListener.dart';
 part '$AUXILIARY_DIR/EventStreamProvider.dart';
 part '$AUXILIARY_DIR/Html5NodeValidator.dart';
 part '$AUXILIARY_DIR/ImmutableListMixin.dart';
 part '$AUXILIARY_DIR/Isolates.dart';
 part '$AUXILIARY_DIR/KeyCode.dart';
 part '$AUXILIARY_DIR/KeyLocation.dart';
 part '$AUXILIARY_DIR/KeyName.dart';
 part '$AUXILIARY_DIR/KeyboardEventStream.dart';
 part '$AUXILIARY_DIR/Microtask.dart';
 part '$AUXILIARY_DIR/NodeValidatorBuilder.dart';
-part '$AUXILIARY_DIR/Point.dart';
 part '$AUXILIARY_DIR/ReadyState.dart';
-part '$AUXILIARY_DIR/Rectangle.dart';
 part '$AUXILIARY_DIR/Serialization.dart';
 part '$AUXILIARY_DIR/WrappedEvent.dart';
 part '$AUXILIARY_DIR/WrappedList.dart';
 part '$AUXILIARY_DIR/_HttpRequestUtils.dart';
 part '$AUXILIARY_DIR/_ListIterators.dart';
 part '$AUXILIARY_DIR/dart2js_Conversions.dart';
 part '$AUXILIARY_DIR/dart2js_CustomElementSupport.dart';
 part '$AUXILIARY_DIR/dart2js_DOMImplementation.dart';
 part '$AUXILIARY_DIR/dart2js_KeyEvent.dart';
 part '$AUXILIARY_DIR/dart2js_LocationWrapper.dart';
@@ skipping 47 matching lines @@
   if (JS('bool', r'!window.$dart$isolate$counter')) {
     JS('void', r'window.$dart$isolate$counter = 1');
   }
   return JS('int', r'window.$dart$isolate$counter++');
 }
 
 // Fast path to invoke JS send port.
 _callPortSync(int id, message) {
   return JS('var', r'ReceivePortSync.dispatchCall(#, #)', id, message);
 }