Add custom annotations to some APIs for native tree shaking.

sdk/lib/html/dart2js/html_dart2js.dart

 library html;
 
 import 'dart:isolate';
 import 'dart:json';
 import 'dart:svg' as svg;
 // 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
@@ skipping 4909 matching lines @@
     if ((?imagedata_OR_sw && (imagedata_OR_sw is ImageData || imagedata_OR_sw == null)) &&
         !?sh) {
       var imagedata_1 = _convertDartToNative_ImageData(imagedata_OR_sw);
       return _convertNativeToDart_ImageData(_createImageData_1(imagedata_1));
     }
     if ((?imagedata_OR_sw && (imagedata_OR_sw is num || imagedata_OR_sw == null))) {
       return _convertNativeToDart_ImageData(_createImageData_2(imagedata_OR_sw, sh));
     }
     throw const Exception("Incorrect number or type of arguments");
   }
+  @Creates('ImageData|=Object')
   _createImageData_1(imagedata) native "createImageData";
+  @Creates('ImageData|=Object')
   _createImageData_2(num sw, sh) native "createImageData";
 
   /** @domName CanvasRenderingContext2D.createLinearGradient */
   CanvasGradient createLinearGradient(num x0, num y0, num x1, num y1) native;
 
   /** @domName CanvasRenderingContext2D.createPattern */
   CanvasPattern createPattern(canvas_OR_image, String repetitionType) native;
 
   /** @domName CanvasRenderingContext2D.createRadialGradient */
   CanvasGradient createRadialGradient(num x0, num y0, num r0, num x1, num y1, num r1) native;
@@ skipping 10 matching lines @@
   /** @domName CanvasRenderingContext2D.fillRect */
   void fillRect(num x, num y, num width, num height) native;
 
   /** @domName CanvasRenderingContext2D.fillText */
   void fillText(String text, num x, num y, [num maxWidth]) native;
 
   /** @domName CanvasRenderingContext2D.getImageData */
   ImageData getImageData(num sx, num sy, num sw, num sh) {
     return _convertNativeToDart_ImageData(_getImageData_1(sx, sy, sw, sh));
   }
+  @Creates('ImageData|=Object')
   _getImageData_1(sx, sy, sw, sh) native "getImageData";
 
   /** @domName CanvasRenderingContext2D.getLineDash */
   List<num> getLineDash() native;
 
   /** @domName CanvasRenderingContext2D.isPointInPath */
   bool isPointInPath(num x, num y) native;
 
   /** @domName CanvasRenderingContext2D.lineTo */
   void lineTo(num x, num y) native;
@@ skipping 79 matching lines @@
   /** @domName CanvasRenderingContext2D.transform */
   void transform(num m11, num m12, num m21, num m22, num dx, num dy) native;
 
   /** @domName CanvasRenderingContext2D.translate */
   void translate(num tx, num ty) native;
 
   /** @domName CanvasRenderingContext2D.webkitGetImageDataHD */
   ImageData webkitGetImageDataHD(num sx, num sy, num sw, num sh) {
     return _convertNativeToDart_ImageData(_webkitGetImageDataHD_1(sx, sy, sw, sh));
   }
+  @Creates('ImageData|=Object')
   _webkitGetImageDataHD_1(sx, sy, sw, sh) native "webkitGetImageDataHD";
 
   /** @domName CanvasRenderingContext2D.webkitPutImageDataHD */
   void webkitPutImageDataHD(ImageData imagedata, num dx, num dy, [num dirtyX, num dirtyY, num dirtyWidth, num dirtyHeight]) {
     if (!?dirtyX &&
         !?dirtyY &&
         !?dirtyWidth &&
         !?dirtyHeight) {
       var imagedata_1 = _convertDartToNative_ImageData(imagedata);
       _webkitPutImageDataHD_1(imagedata_1, dx, dy);
@@ skipping 1708 matching lines @@
 
 class DocumentFragment extends Node native "*DocumentFragment" {
   factory DocumentFragment() => _DocumentFragmentFactoryProvider.createDocumentFragment();
 
   factory DocumentFragment.html(String html) =>
       _DocumentFragmentFactoryProvider.createDocumentFragment_html(html);
 
   factory DocumentFragment.svg(String svgContent) =>
       new _DocumentFragmentFactoryProvider.createDocumentFragment_svg(svgContent);
 
+  // This is a field of a native object, but used only from Dart code, so does
+  // not instantiate any native classes.
+  @Creates('Null')
   List<Element> _elements;
 
   List<Element> get elements {
     if (_elements == null) {
       _elements = new FilteredElementList(this);
     }
     return _elements;
   }
 
   // TODO: The type of value should be Collection<Element>. See http://b/5392897
@@ skipping 1958 matching lines @@
 
   static const int LOADING = 1;
 
   /** @domName FileReader.error */
   final FileError error;
 
   /** @domName FileReader.readyState */
   final int readyState;
 
   /** @domName FileReader.result */
+  @Creates('String|ArrayBuffer|Null')
   final Object result;
 
   /** @domName FileReader.abort */
   void abort() native;
 
   /** @domName FileReader.addEventListener */
   void $dom_addEventListener(String type, EventListener listener, [bool useCapture]) native "addEventListener";
 
   /** @domName FileReader.dispatchEvent */
   bool $dom_dispatchEvent(Event evt) native "dispatchEvent";
@@ skipping 1044 matching lines @@
   static const int LOADING = 3;
 
   static const int OPENED = 1;
 
   static const int UNSENT = 0;
 
   /** @domName XMLHttpRequest.readyState */
   final int readyState;
 
   /** @domName XMLHttpRequest.response */
+  @Creates('ArrayBuffer|Blob|Document|=Object|=List|String|num')
   final Object response;
 
   /** @domName XMLHttpRequest.responseText */
   final String responseText;
 
   /** @domName XMLHttpRequest.responseType */
   String responseType;
 
   /** @domName XMLHttpRequest.responseXML */
   final Document responseXML;
@@ skipping 157 matching lines @@
   static const int NEXT_NO_DUPLICATE = 1;
 
   static const int PREV = 2;
 
   static const int PREV_NO_DUPLICATE = 3;
 
   /** @domName IDBCursor.direction */
   final String direction;
 
   /** @domName IDBCursor.key */
+  @annotation_Creates_IDBKey @annotation_Returns_IDBKey
   final Object key;
 
   /** @domName IDBCursor.primaryKey */
   final Object primaryKey;
 
   /** @domName IDBCursor.source */
   final dynamic source;
 
   /** @domName IDBCursor.advance */
   void advance(int count) native;
@@ skipping 23 matching lines @@
 }
 // 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.
 
 
 /// @domName IDBCursorWithValue
 class IDBCursorWithValue extends IDBCursor native "*IDBCursorWithValue" {
 
   /** @domName IDBCursorWithValue.value */
+  @annotation_Creates_SerializedScriptValue @annotation_Returns_SerializedScriptValue
   final Object value;
 }
 // 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 IDBDatabase extends EventTarget native "*IDBDatabase" {
 
   IDBTransaction transaction(storeName_OR_storeNames, String mode) {
@@ skipping 155 matching lines @@
     var first_1 = _convertDartToNative_IDBKey(first);
     var second_2 = _convertDartToNative_IDBKey(second);
     return _cmp_1(first_1, second_2);
   }
   int _cmp_1(first, second) native "cmp";
 
   /** @domName IDBFactory.deleteDatabase */
   IDBVersionChangeRequest deleteDatabase(String name) native;
 
   /** @domName IDBFactory.open */
+  @Returns('IDBRequest') @Creates('IDBRequest') @Creates('IDBDatabase')
   IDBOpenDBRequest open(String name, [int version]) native;
 
   /** @domName IDBFactory.webkitGetDatabaseNames */
   IDBRequest webkitGetDatabaseNames() native;
 }
 // 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.
 
 
@@ skipping 37 matching lines @@
   IDBRequest get(key) {
     if ((?key && (key is IDBKeyRange || key == null))) {
       return _get_1(key);
     }
     if (?key) {
       var key_1 = _convertDartToNative_IDBKey(key);
       return _get_2(key_1);
     }
     throw const Exception("Incorrect number or type of arguments");
   }
+  @Returns('IDBRequest') @Creates('IDBRequest') @annotation_Creates_SerializedScriptValue
   IDBRequest _get_1(IDBKeyRange key) native "get";
+  @Returns('IDBRequest') @Creates('IDBRequest') @annotation_Creates_SerializedScriptValue
   IDBRequest _get_2(key) native "get";
 
   /** @domName IDBIndex.getKey */
   IDBRequest getKey(key) {
     if ((?key && (key is IDBKeyRange || key == null))) {
       return _getKey_1(key);
     }
     if (?key) {
       var key_1 = _convertDartToNative_IDBKey(key);
       return _getKey_2(key_1);
     }
     throw const Exception("Incorrect number or type of arguments");
   }
+  @Returns('IDBRequest') @Creates('IDBRequest') @annotation_Creates_SerializedScriptValue @Creates('IDBObjectStore')
   IDBRequest _getKey_1(IDBKeyRange key) native "getKey";
+  @Returns('IDBRequest') @Creates('IDBRequest') @annotation_Creates_SerializedScriptValue @Creates('IDBObjectStore')
   IDBRequest _getKey_2(key) native "getKey";
 
   /** @domName IDBIndex.openCursor */
   IDBRequest openCursor([key_OR_range, String direction]) {
     if (!?key_OR_range &&
         !?direction) {
       return _openCursor_1();
     }
     if ((?key_OR_range && (key_OR_range is IDBKeyRange || key_OR_range == null)) &&
         !?direction) {
       return _openCursor_2(key_OR_range);
     }
     if ((?key_OR_range && (key_OR_range is IDBKeyRange || key_OR_range == null))) {
       return _openCursor_3(key_OR_range, direction);
     }
     if (?key_OR_range &&
         !?direction) {
       var key_1 = _convertDartToNative_IDBKey(key_OR_range);
       return _openCursor_4(key_1);
     }
     if (?key_OR_range) {
       var key_2 = _convertDartToNative_IDBKey(key_OR_range);
       return _openCursor_5(key_2, direction);
     }
     throw const Exception("Incorrect number or type of arguments");
   }
+  @Returns('IDBRequest') @Creates('IDBRequest') @Creates('IDBCursor')
   IDBRequest _openCursor_1() native "openCursor";
+  @Returns('IDBRequest') @Creates('IDBRequest') @Creates('IDBCursor')
   IDBRequest _openCursor_2(IDBKeyRange range) native "openCursor";
+  @Returns('IDBRequest') @Creates('IDBRequest') @Creates('IDBCursor')
   IDBRequest _openCursor_3(IDBKeyRange range, direction) native "openCursor";
+  @Returns('IDBRequest') @Creates('IDBRequest') @Creates('IDBCursor')
   IDBRequest _openCursor_4(key) native "openCursor";
+  @Returns('IDBRequest') @Creates('IDBRequest') @Creates('IDBCursor')
   IDBRequest _openCursor_5(key, direction) native "openCursor";
 
   /** @domName IDBIndex.openKeyCursor */
   IDBRequest openKeyCursor([key_OR_range, String direction]) {
     if (!?key_OR_range &&
         !?direction) {
       return _openKeyCursor_1();
     }
     if ((?key_OR_range && (key_OR_range is IDBKeyRange || key_OR_range == null)) &&
         !?direction) {
       return _openKeyCursor_2(key_OR_range);
     }
     if ((?key_OR_range && (key_OR_range is IDBKeyRange || key_OR_range == null))) {
       return _openKeyCursor_3(key_OR_range, direction);
     }
     if (?key_OR_range &&
         !?direction) {
       var key_1 = _convertDartToNative_IDBKey(key_OR_range);
       return _openKeyCursor_4(key_1);
     }
     if (?key_OR_range) {
       var key_2 = _convertDartToNative_IDBKey(key_OR_range);
       return _openKeyCursor_5(key_2, direction);
     }
     throw const Exception("Incorrect number or type of arguments");
   }
+  @Returns('IDBRequest') @Creates('IDBRequest') @Creates('IDBCursor')
   IDBRequest _openKeyCursor_1() native "openKeyCursor";
+  @Returns('IDBRequest') @Creates('IDBRequest') @Creates('IDBCursor')
   IDBRequest _openKeyCursor_2(IDBKeyRange range) native "openKeyCursor";
+  @Returns('IDBRequest') @Creates('IDBRequest') @Creates('IDBCursor')
   IDBRequest _openKeyCursor_3(IDBKeyRange range, direction) native "openKeyCursor";
+  @Returns('IDBRequest') @Creates('IDBRequest') @Creates('IDBCursor')
   IDBRequest _openKeyCursor_4(key) native "openKeyCursor";
+  @Returns('IDBRequest') @Creates('IDBRequest') @Creates('IDBCursor')
   IDBRequest _openKeyCursor_5(key, direction) native "openKeyCursor";
 }
 // 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.
 
 
 /// @domName IDBKey
 class IDBKey native "*IDBKey" {
 }
@@ skipping 122 matching lines @@
   /** @domName IDBObjectStore.add */
   IDBRequest add(/*any*/ value, [/*IDBKey*/ key]) {
     if (?key) {
       var value_1 = _convertDartToNative_SerializedScriptValue(value);
       var key_2 = _convertDartToNative_IDBKey(key);
       return _add_1(value_1, key_2);
     }
     var value_3 = _convertDartToNative_SerializedScriptValue(value);
     return _add_2(value_3);
   }
+  @Returns('IDBRequest') @Creates('IDBRequest') @annotation_Creates_IDBKey
   IDBRequest _add_1(value, key) native "add";
+  @Returns('IDBRequest') @Creates('IDBRequest') @annotation_Creates_IDBKey
   IDBRequest _add_2(value) native "add";
 
   /** @domName IDBObjectStore.clear */
   IDBRequest clear() native;
 
   /** @domName IDBObjectStore.count */
   IDBRequest count([key_OR_range]) {
     if (!?key_OR_range) {
       return _count_1();
     }
@@ skipping 58 matching lines @@
   IDBRequest getObject(key) {
     if ((?key && (key is IDBKeyRange || key == null))) {
       return _getObject_1(key);
     }
     if (?key) {
       var key_1 = _convertDartToNative_IDBKey(key);
       return _getObject_2(key_1);
     }
     throw const Exception("Incorrect number or type of arguments");
   }
+  @Returns('IDBRequest') @Creates('IDBRequest') @annotation_Creates_SerializedScriptValue
   IDBRequest _getObject_1(IDBKeyRange key) native "get";
+  @Returns('IDBRequest') @Creates('IDBRequest') @annotation_Creates_SerializedScriptValue
   IDBRequest _getObject_2(key) native "get";
 
   /** @domName IDBObjectStore.index */
   IDBIndex index(String name) native;
 
   /** @domName IDBObjectStore.openCursor */
   IDBRequest openCursor([key_OR_range, String direction]) {
     if (!?key_OR_range &&
         !?direction) {
       return _openCursor_1();
     }
     if ((?key_OR_range && (key_OR_range is IDBKeyRange || key_OR_range == null)) &&
         !?direction) {
       return _openCursor_2(key_OR_range);
     }
     if ((?key_OR_range && (key_OR_range is IDBKeyRange || key_OR_range == null))) {
       return _openCursor_3(key_OR_range, direction);
     }
     if (?key_OR_range &&
         !?direction) {
       var key_1 = _convertDartToNative_IDBKey(key_OR_range);
       return _openCursor_4(key_1);
     }
     if (?key_OR_range) {
       var key_2 = _convertDartToNative_IDBKey(key_OR_range);
       return _openCursor_5(key_2, direction);
     }
     throw const Exception("Incorrect number or type of arguments");
   }
+  @Returns('IDBRequest') @Creates('IDBRequest') @Creates('IDBCursor')
   IDBRequest _openCursor_1() native "openCursor";
+  @Returns('IDBRequest') @Creates('IDBRequest') @Creates('IDBCursor')
   IDBRequest _openCursor_2(IDBKeyRange range) native "openCursor";
+  @Returns('IDBRequest') @Creates('IDBRequest') @Creates('IDBCursor')
   IDBRequest _openCursor_3(IDBKeyRange range, direction) native "openCursor";
+  @Returns('IDBRequest') @Creates('IDBRequest') @Creates('IDBCursor')
   IDBRequest _openCursor_4(key) native "openCursor";
+  @Returns('IDBRequest') @Creates('IDBRequest') @Creates('IDBCursor')
   IDBRequest _openCursor_5(key, direction) native "openCursor";
 
   /** @domName IDBObjectStore.put */
   IDBRequest put(/*any*/ value, [/*IDBKey*/ key]) {
     if (?key) {
       var value_1 = _convertDartToNative_SerializedScriptValue(value);
       var key_2 = _convertDartToNative_IDBKey(key);
       return _put_1(value_1, key_2);
     }
     var value_3 = _convertDartToNative_SerializedScriptValue(value);
     return _put_2(value_3);
   }
+  @Returns('IDBRequest') @Creates('IDBRequest') @annotation_Creates_IDBKey
   IDBRequest _put_1(value, key) native "put";
+  @Returns('IDBRequest') @Creates('IDBRequest') @annotation_Creates_IDBKey
   IDBRequest _put_2(value) native "put";
 }
 // 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.
 
 
 /// @domName IDBOpenDBRequest
 class IDBOpenDBRequest extends IDBRequest implements EventTarget native "*IDBOpenDBRequest" {
 
@@ skipping 32 matching lines @@
   final int errorCode;
 
   /** @domName IDBRequest.readyState */
   final String readyState;
 
   /** @domName IDBRequest.result */
   dynamic get result => _convertNativeToDart_IDBAny(this._result);
   dynamic get _result => JS("dynamic", "#.result", this);
 
   /** @domName IDBRequest.source */
+  @Creates('Null')
   final dynamic source;
 
   /** @domName IDBRequest.transaction */
   final IDBTransaction transaction;
 
   /** @domName IDBRequest.webkitErrorMessage */
   final String webkitErrorMessage;
 
   /** @domName IDBRequest.addEventListener */
   void $dom_addEventListener(String type, EventListener listener, [bool useCapture]) native "addEventListener";
@@ skipping 5256 matching lines @@
 
   List<Map> getRange(int start, int rangeLength) =>
       _Lists.getRange(this, start, rangeLength, <Map>[]);
 
   // -- end List<Map> mixins.
 
   /** @domName SQLResultSetRowList.item */
   Map item(int index) {
     return _convertNativeToDart_Dictionary(_item_1(index));
   }
+  @Creates('=Object')
   _item_1(index) native "item";
 }
 // 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.
 
 // WARNING: Do not edit - generated code.
 
 
 typedef void SQLStatementCallback(SQLTransaction transaction, SQLResultSet resultSet);
@@ skipping 8488 matching lines @@
   }
   return imageData;
 }
 
 
 /// Converts a JavaScript object with properties into a Dart Map.
 /// Not suitable for nested objects.
 Map _convertNativeToDart_Dictionary(object) {
   if (object == null) return null;
   var dict = {};
-  for (final key in JS('List', 'Object.getOwnPropertyNames(#)', object)) {
+  for (final key in JS('=List', 'Object.getOwnPropertyNames(#)', object)) {
     dict[key] = JS('var', '#[#]', object, key);
   }
   return dict;
 }
 
 /// Converts a flat Dart map into a JavaScript object with properties.
 _convertDartToNative_Dictionary(Map dict) {
   if (dict == null) return null;
   var object = JS('var', '{}');
   dict.forEach((String key, value) {
@@ skipping 156 matching lines @@
     if (e is List) {
       // Since a JavaScript Array is an instance of Dart List it is possible to
       // avoid making a copy of the list if there is no need to copy anything
       // reachable from the array.  We defer creating a new array until a cycle
       // is detected or a subgraph was copied.
       int length = e.length;
       var slot = findSlot(e);
       var copy = readSlot(slot);
       if (copy != null) {
         if (true == copy) {  // Cycle, so commit to making a copy.
-          copy = JS('List', 'new Array(#)', length);
+          copy = JS('=List', 'new Array(#)', length);
           writeSlot(slot, copy);
         }
         return copy;
       }
 
       int i = 0;
 
       if (_isJavaScriptArray(e) &&
           // We have to copy immutable lists, otherwise the structured clone
           // algorithm will copy the .immutable$list marker property, making the
           // list immutable when received!
           !_isImmutableJavaScriptArray(e)) {
         writeSlot(slot, true);  // Deferred copy.
         for ( ; i < length; i++) {
           var element = e[i];
           var elementCopy = walk(element);
           if (!identical(elementCopy, element)) {
             copy = readSlot(slot);   // Cyclic reference may have created it.
             if (true == copy) {
-              copy = JS('List', 'new Array(#)', length);
+              copy = JS('=List', 'new Array(#)', length);
               writeSlot(slot, copy);
             }
             for (int j = 0; j < i; j++) {
               copy[j] = e[j];
             }
             copy[i] = elementCopy;
             i++;
             break;
           }
         }
         if (copy == null) {
           copy = e;
           writeSlot(slot, copy);
         }
       } else {
         // Not a JavaScript Array.  We are forced to make a copy.
-        copy = JS('List', 'new Array(#)', length);
+        copy = JS('=List', 'new Array(#)', length);
         writeSlot(slot, copy);
       }
 
       for ( ; i < length; i++) {
         copy[i] = walk(e[i]);
       }
       return copy;
     }
 
     throw new UnimplementedError('structured clone of other type');
@@ skipping 59 matching lines @@
 
     if (_isJavaScriptSimpleObject(e)) {
       // TODO(sra): If mustCopy is false, swizzle the prototype for one of a Map
       // implementation that uses the properies as storage.
       var slot = findSlot(e);
       var copy = readSlot(slot);
       if (copy != null) return copy;
       copy = {};
 
       writeSlot(slot, copy);
-      for (final key in JS('List', 'Object.keys(#)', e)) {
+      for (final key in JS('=List', 'Object.keys(#)', e)) {
         copy[key] = walk(JS('var', '#[#]', e, key));
       }
       return copy;
     }
 
     if (_isJavaScriptArray(e)) {
       var slot = findSlot(e);
       var copy = readSlot(slot);
       if (copy != null) return copy;
 
       int length = e.length;
       // Since a JavaScript Array is an instance of Dart List, we can modify it
       // in-place unless we must copy.
-      copy = mustCopy ? JS('List', 'new Array(#)', length) : e;
+      copy = mustCopy ? JS('=List', 'new Array(#)', length) : e;
       writeSlot(slot, copy);
 
       for (int i = 0; i < length; i++) {
         copy[i] = walk(e[i]);
       }
       return copy;
     }
 
     // Assume anything else is already a valid Dart object, either by having
     // already been processed, or e.g. a clonable native class.
     return e;
   }
 
   var copy = walk(object);
   return copy;
 }
 
 
 bool _isJavaScriptDate(value) => JS('bool', '# instanceof Date', value);
 bool _isJavaScriptRegExp(value) => JS('bool', '# instanceof RegExp', value);
 bool _isJavaScriptArray(value) => JS('bool', '# instanceof Array', value);
 bool _isJavaScriptSimpleObject(value) =>
     JS('bool', 'Object.getPrototypeOf(#) === Object.prototype', value);
 bool _isImmutableJavaScriptArray(value) =>
     JS('bool', r'!!(#.immutable$list)', value);
+
+
+
+const String _serializedScriptValue =
+    'num|String|bool|'
+    '=List|=Object|'
+    'Blob|File|ArrayBuffer|ArrayBufferView'
+    // TODO(sra): Add Date, RegExp.
+    ;
+
+const annotation_Creates_SerializedScriptValue =
+    const Creates(_serializedScriptValue);
+const annotation_Returns_SerializedScriptValue =
+    const Returns(_serializedScriptValue);
+
+const String _idbKey = '=List|=Object|num|String';  // TODO(sra): Add Date.
+const annotation_Creates_IDBKey = const Creates(_idbKey);
+const annotation_Returns_IDBKey = const Returns(_idbKey);
 // 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.
 
 
 // TODO(vsm): Unify with Dartium version.
 class _DOMWindowCrossFrame implements Window {
   // Private window.  Note, this is a window in another frame, so it
   // cannot be typed as "Window" as its prototype is not patched
   // properly.  Its fields and methods can only be accessed via JavaScript.
@@ skipping 527 matching lines @@
     if (length < 0) throw new ArgumentError('length');
     if (start < 0) throw new RangeError.value(start);
     int end = start + length;
     if (end > a.length) throw new RangeError.value(end);
     for (int i = start; i < end; i++) {
       accumulator.add(a[i]);
     }
     return accumulator;
   }
 }