Remove more question marks.

sdk/lib/html/dart2js/html_dart2js.dart

 /// The Dart HTML library.
 library dart.dom.html;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:_collection-dev';
 import 'dart:html_common';
 import 'dart:indexed_db';
 import 'dart:isolate';
 import 'dart:json' as json;
@@ skipping 401 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLAudioElement')
 class AudioElement extends MediaElement native "HTMLAudioElement" {
 
   @DomName('HTMLAudioElement.HTMLAudioElement')
   @DocsEditable
   factory AudioElement([String src]) {
-    if (?src) {
+    if (src != null) {
       return AudioElement._create_1(src);
     }
     return AudioElement._create_2();
   }
   static AudioElement _create_1(src) => JS('AudioElement', 'new Audio(#)', src);
   static AudioElement _create_2() => JS('AudioElement', 'new Audio()');
 }
 // 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 331 matching lines @@
   int height;
 
   /// The width of this canvas element in CSS pixels.
   @DomName('HTMLCanvasElement.width')
   @DocsEditable
   int width;
 
   @DomName('HTMLCanvasElement.getContext')
   @DocsEditable
   CanvasRenderingContext getContext(String contextId, [Map attrs]) {
-    if (?attrs) {
+    if (attrs != null) {
       var attrs_1 = convertDartToNative_Dictionary(attrs);
       return _getContext_1(contextId, attrs_1);
     }
     return _getContext_2(contextId);
   }
   @JSName('getContext')
   @DomName('HTMLCanvasElement.getContext')
   @DocsEditable
   CanvasRenderingContext _getContext_1(contextId, attrs) native;
   @JSName('getContext')
@@ skipping 392 matching lines @@
   @DocsEditable
   TextMetrics measureText(String text) native;
 
   @DomName('CanvasRenderingContext2D.moveTo')
   @DocsEditable
   void moveTo(num x, num y) native;
 
   @DomName('CanvasRenderingContext2D.putImageData')
   @DocsEditable
   void putImageData(ImageData imagedata, num dx, num dy, [num dirtyX, num dirtyY, num dirtyWidth, num dirtyHeight]) {
-    if (!?dirtyX && !?dirtyY && !?dirtyWidth && !?dirtyHeight) {
+    if (dirtyX == null && dirtyY == null && dirtyWidth == null && dirtyHeight == null) {
       var imagedata_1 = _convertDartToNative_ImageData(imagedata);
       _putImageData_1(imagedata_1, dx, dy);
       return;
     }
     var imagedata_2 = _convertDartToNative_ImageData(imagedata);
     _putImageData_2(imagedata_2, dx, dy, dirtyX, dirtyY, dirtyWidth, dirtyHeight);
     return;
     throw new ArgumentError("Incorrect number or type of arguments");
   }
   @JSName('putImageData')
@@ skipping 74 matching lines @@
   @Experimental
   @Creates('ImageData|=Object')
   _getImageDataHD_1(sx, sy, sw, sh) native;
 
   @DomName('CanvasRenderingContext2D.webkitPutImageDataHD')
   @DocsEditable
   @SupportedBrowser(SupportedBrowser.CHROME)
   @SupportedBrowser(SupportedBrowser.SAFARI)
   @Experimental
   void putImageDataHD(ImageData imagedata, num dx, num dy, [num dirtyX, num dirtyY, num dirtyWidth, num dirtyHeight]) {
-    if (!?dirtyX && !?dirtyY && !?dirtyWidth && !?dirtyHeight) {
+    if (dirtyX == null && dirtyY == null && dirtyWidth == null && dirtyHeight == null) {
       var imagedata_1 = _convertDartToNative_ImageData(imagedata);
       _putImageDataHD_1(imagedata_1, dx, dy);
       return;
     }
     var imagedata_2 = _convertDartToNative_ImageData(imagedata);
     _putImageDataHD_2(imagedata_2, dx, dy, dirtyX, dirtyY, dirtyWidth, dirtyHeight);
     return;
     throw new ArgumentError("Incorrect number or type of arguments");
   }
   @JSName('webkitPutImageDataHD')
@@ skipping 4504 matching lines @@
     return _getFile(path);
   }
 
   @DomName('DirectoryEntry.createReader')
   @DocsEditable
   DirectoryReader createReader() native;
 
   @DomName('DirectoryEntry.getDirectory')
   @DocsEditable
   void __getDirectory(String path, {Map options, _EntryCallback successCallback, _ErrorCallback errorCallback}) {
-    if (?errorCallback) {
+    if (errorCallback != null) {
       var options_1 = convertDartToNative_Dictionary(options);
       ___getDirectory_1(path, options_1, successCallback, errorCallback);
       return;
     }
-    if (?successCallback) {
+    if (successCallback != null) {
       var options_2 = convertDartToNative_Dictionary(options);
       ___getDirectory_2(path, options_2, successCallback);
       return;
     }
-    if (?options) {
+    if (options != null) {
       var options_3 = convertDartToNative_Dictionary(options);
       ___getDirectory_3(path, options_3);
       return;
     }
     ___getDirectory_4(path);
     return;
   }
   @JSName('getDirectory')
   @DomName('DirectoryEntry.getDirectory')
   @DocsEditable
@@ skipping 18 matching lines @@
     var completer = new Completer<Entry>();
     __getDirectory(path, options : options,
         successCallback : (value) { completer.complete(value); },
         errorCallback : (error) { completer.completeError(error); });
     return completer.future;
   }
 
   @DomName('DirectoryEntry.getFile')
   @DocsEditable
   void __getFile(String path, {Map options, _EntryCallback successCallback, _ErrorCallback errorCallback}) {
-    if (?errorCallback) {
+    if (errorCallback != null) {
       var options_1 = convertDartToNative_Dictionary(options);
       ___getFile_1(path, options_1, successCallback, errorCallback);
       return;
     }
-    if (?successCallback) {
+    if (successCallback != null) {
       var options_2 = convertDartToNative_Dictionary(options);
       ___getFile_2(path, options_2, successCallback);
       return;
     }
-    if (?options) {
+    if (options != null) {
       var options_3 = convertDartToNative_Dictionary(options);
       ___getFile_3(path, options_3);
       return;
     }
     ___getFile_4(path);
     return;
   }
   @JSName('getFile')
   @DomName('DirectoryEntry.getFile')
   @DocsEditable
@@ skipping 468 matching lines @@
   @SupportedBrowser(SupportedBrowser.SAFARI)
   @Experimental
   NamedFlowCollection getNamedFlows() native;
 
   @DomName('Document.webkitRegister')
   @DocsEditable
   @SupportedBrowser(SupportedBrowser.CHROME)
   @SupportedBrowser(SupportedBrowser.SAFARI)
   @Experimental
   CustomElementConstructor register(String name, [Map options]) {
-    if (?options) {
+    if (options != null) {
       var options_1 = convertDartToNative_Dictionary(options);
       return _register_1(name, options_1);
     }
     return _register_2(name);
   }
   @JSName('webkitRegister')
   @DomName('Document.webkitRegister')
   @DocsEditable
   @SupportedBrowser(SupportedBrowser.CHROME)
   @SupportedBrowser(SupportedBrowser.SAFARI)
@@ skipping 2452 matching lines @@
   @DocsEditable
   static const EventStreamProvider<MessageEvent> messageEvent = const EventStreamProvider<MessageEvent>('message');
 
   @DomName('EventSource.openEvent')
   @DocsEditable
   static const EventStreamProvider<Event> openEvent = const EventStreamProvider<Event>('open');
 
   @DomName('EventSource.EventSource')
   @DocsEditable
   static EventSource _factoryEventSource(String url, [Map eventSourceInit]) {
-    if (?eventSourceInit) {
+    if (eventSourceInit != null) {
       return EventSource._create_1(url, eventSourceInit);
     }
     return EventSource._create_2(url);
   }
   static EventSource _create_1(url, eventSourceInit) => JS('EventSource', 'new EventSource(#,#)', url, eventSourceInit);
   static EventSource _create_2(url) => JS('EventSource', 'new EventSource(#)', url);
 
   static const int CLOSED = 2;
 
   static const int CONNECTING = 0;
@@ skipping 725 matching lines @@
 @DomName('FormData')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX)
 @SupportedBrowser(SupportedBrowser.IE, '10')
 @SupportedBrowser(SupportedBrowser.SAFARI)
 class FormData native "FormData" {
 
   @DomName('FormData.DOMFormData')
   @DocsEditable
   factory FormData([FormElement form]) {
-    if (?form) {
+    if (form != null) {
       return FormData._create_1(form);
     }
     return FormData._create_2();
   }
   static FormData _create_1(form) => JS('FormData', 'new FormData(#)', form);
   static FormData _create_2() => JS('FormData', 'new FormData()');
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => JS('bool', '!!(window.FormData)');
 
@@ skipping 3404 matching lines @@
   @DocsEditable
   static const EventStreamProvider<Event> endedEvent = const EventStreamProvider<Event>('ended');
 
   @DomName('MediaStream.removetrackEvent')
   @DocsEditable
   static const EventStreamProvider<Event> removeTrackEvent = const EventStreamProvider<Event>('removetrack');
 
   @DomName('MediaStream.MediaStream')
   @DocsEditable
   factory MediaStream([stream_OR_tracks]) {
-    if (!?stream_OR_tracks) {
+    if (stream_OR_tracks == null) {
       return MediaStream._create_1();
     }
     if ((stream_OR_tracks is MediaStream || stream_OR_tracks == null)) {
       return MediaStream._create_2(stream_OR_tracks);
     }
     if ((stream_OR_tracks is List<MediaStreamTrack> || stream_OR_tracks == null)) {
       return MediaStream._create_3(stream_OR_tracks);
     }
     throw new ArgumentError("Incorrect number or type of arguments");
   }
@@ skipping 327 matching lines @@
   @DocsEditable
   void close() native;
 
   @DomName('MessagePort.dispatchEvent')
   @DocsEditable
   bool dispatchEvent(Event evt) native;
 
   @DomName('MessagePort.postMessage')
   @DocsEditable
   void postMessage(/*any*/ message, [List messagePorts]) {
-    if (?messagePorts) {
+    if (messagePorts != null) {
       var message_1 = convertDartToNative_SerializedScriptValue(message);
       _postMessage_1(message_1, messagePorts);
       return;
     }
     var message_2 = convertDartToNative_SerializedScriptValue(message);
     _postMessage_2(message_2);
     return;
   }
   @JSName('postMessage')
   @DomName('MessagePort.postMessage')
@@ skipping 1478 matching lines @@
   @DocsEditable
   static const EventStreamProvider<Event> errorEvent = const EventStreamProvider<Event>('error');
 
   @DomName('Notification.showEvent')
   @DocsEditable
   static const EventStreamProvider<Event> showEvent = const EventStreamProvider<Event>('show');
 
   @DomName('Notification.Notification')
   @DocsEditable
   static Notification _factoryNotification(String title, [Map options]) {
-    if (?options) {
+    if (options != null) {
       return Notification._create_1(title, options);
     }
     return Notification._create_2(title);
   }
   static Notification _create_1(title, options) => JS('Notification', 'new Notification(#,#)', title, options);
   static Notification _create_2(title) => JS('Notification', 'new Notification(#)', title);
 
   @DomName('Notification.dir')
   @DocsEditable
   String dir;
@@ skipping 245 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('HTMLOptionElement')
 class OptionElement extends Element native "HTMLOptionElement" {
 
   @DomName('HTMLOptionElement.HTMLOptionElement')
   @DocsEditable
   factory OptionElement([String data, String value, bool defaultSelected, bool selected]) {
-    if (?selected) {
+    if (selected != null) {
       return OptionElement._create_1(data, value, defaultSelected, selected);
     }
-    if (?defaultSelected) {
+    if (defaultSelected != null) {
       return OptionElement._create_2(data, value, defaultSelected);
     }
-    if (?value) {
+    if (value != null) {
       return OptionElement._create_3(data, value);
     }
-    if (?data) {
+    if (data != null) {
       return OptionElement._create_4(data);
     }
     return OptionElement._create_5();
   }
   static OptionElement _create_1(data, value, defaultSelected, selected) => JS('OptionElement', 'new Option(#,#,#,#)', data, value, defaultSelected, selected);
   static OptionElement _create_2(data, value, defaultSelected) => JS('OptionElement', 'new Option(#,#,#)', data, value, defaultSelected);
   static OptionElement _create_3(data, value) => JS('OptionElement', 'new Option(#,#)', data, value);
   static OptionElement _create_4(data) => JS('OptionElement', 'new Option(#)', data);
   static OptionElement _create_5() => JS('OptionElement', 'new Option()');
 
@@ skipping 173 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('Path')
 class Path native "Path" {
 
   @DomName('Path.DOMPath')
   @DocsEditable
   factory Path([path_OR_text]) {
-    if (!?path_OR_text) {
+    if (path_OR_text == null) {
       return Path._create_1();
     }
     if ((path_OR_text is Path || path_OR_text == null)) {
       return Path._create_2(path_OR_text);
     }
     if ((path_OR_text is String || path_OR_text == null)) {
       return Path._create_3(path_OR_text);
     }
     throw new ArgumentError("Incorrect number or type of arguments");
   }
@@ skipping 1152 matching lines @@
   @DocsEditable
   void $dom_addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   @DomName('RTCPeerConnection.addIceCandidate')
   @DocsEditable
   void addIceCandidate(RtcIceCandidate candidate) native;
 
   @DomName('RTCPeerConnection.addStream')
   @DocsEditable
   void addStream(MediaStream stream, [Map mediaConstraints]) {
-    if (?mediaConstraints) {
+    if (mediaConstraints != null) {
       var mediaConstraints_1 = convertDartToNative_Dictionary(mediaConstraints);
       _addStream_1(stream, mediaConstraints_1);
       return;
     }
     _addStream_2(stream);
     return;
   }
   @JSName('addStream')
   @DomName('RTCPeerConnection.addStream')
   @DocsEditable
   void _addStream_1(MediaStream stream, mediaConstraints) native;
   @JSName('addStream')
   @DomName('RTCPeerConnection.addStream')
   @DocsEditable
   void _addStream_2(MediaStream stream) native;
 
   @DomName('RTCPeerConnection.close')
   @DocsEditable
   void close() native;
 
   @DomName('RTCPeerConnection.createAnswer')
   @DocsEditable
   void _createAnswer(_RtcSessionDescriptionCallback successCallback, [_RtcErrorCallback failureCallback, Map mediaConstraints]) {
-    if (?mediaConstraints) {
+    if (mediaConstraints != null) {
       var mediaConstraints_1 = convertDartToNative_Dictionary(mediaConstraints);
       __createAnswer_1(successCallback, failureCallback, mediaConstraints_1);
       return;
     }
     __createAnswer_2(successCallback, failureCallback);
     return;
   }
   @JSName('createAnswer')
   @DomName('RTCPeerConnection.createAnswer')
   @DocsEditable
   void __createAnswer_1(_RtcSessionDescriptionCallback successCallback, _RtcErrorCallback failureCallback, mediaConstraints) native;
   @JSName('createAnswer')
   @DomName('RTCPeerConnection.createAnswer')
   @DocsEditable
   void __createAnswer_2(_RtcSessionDescriptionCallback successCallback, _RtcErrorCallback failureCallback) native;
 
   @JSName('createDTMFSender')
   @DomName('RTCPeerConnection.createDTMFSender')
   @DocsEditable
   RtcDtmfSender createDtmfSender(MediaStreamTrack track) native;
 
   @DomName('RTCPeerConnection.createDataChannel')
   @DocsEditable
   RtcDataChannel createDataChannel(String label, [Map options]) {
-    if (?options) {
+    if (options != null) {
       var options_1 = convertDartToNative_Dictionary(options);
       return _createDataChannel_1(label, options_1);
     }
     return _createDataChannel_2(label);
   }
   @JSName('createDataChannel')
   @DomName('RTCPeerConnection.createDataChannel')
   @DocsEditable
   RtcDataChannel _createDataChannel_1(label, options) native;
   @JSName('createDataChannel')
   @DomName('RTCPeerConnection.createDataChannel')
   @DocsEditable
   RtcDataChannel _createDataChannel_2(label) native;
 
   @DomName('RTCPeerConnection.createOffer')
   @DocsEditable
   void _createOffer(_RtcSessionDescriptionCallback successCallback, [_RtcErrorCallback failureCallback, Map mediaConstraints]) {
-    if (?mediaConstraints) {
+    if (mediaConstraints != null) {
       var mediaConstraints_1 = convertDartToNative_Dictionary(mediaConstraints);
       __createOffer_1(successCallback, failureCallback, mediaConstraints_1);
       return;
     }
     __createOffer_2(successCallback, failureCallback);
     return;
   }
   @JSName('createOffer')
   @DomName('RTCPeerConnection.createOffer')
   @DocsEditable
@@ skipping 60 matching lines @@
     var completer = new Completer();
     _setRemoteDescription(description,
         () { completer.complete(); },
         (error) { completer.completeError(error); });
     return completer.future;
   }
 
   @DomName('RTCPeerConnection.updateIce')
   @DocsEditable
   void updateIce([Map configuration, Map mediaConstraints]) {
-    if (?mediaConstraints) {
+    if (mediaConstraints != null) {
       var configuration_1 = convertDartToNative_Dictionary(configuration);
       var mediaConstraints_2 = convertDartToNative_Dictionary(mediaConstraints);
       _updateIce_1(configuration_1, mediaConstraints_2);
       return;
     }
-    if (?configuration) {
+    if (configuration != null) {
       var configuration_3 = convertDartToNative_Dictionary(configuration);
       _updateIce_2(configuration_3);
       return;
     }
     _updateIce_3();
     return;
   }
   @JSName('updateIce')
   @DomName('RTCPeerConnection.updateIce')
   @DocsEditable
@@ skipping 2976 matching lines @@
   @DocsEditable
   static const EventStreamProvider<MessageEvent> messageEvent = const EventStreamProvider<MessageEvent>('message');
 
   @DomName('WebSocket.openEvent')
   @DocsEditable
   static const EventStreamProvider<Event> openEvent = const EventStreamProvider<Event>('open');
 
   @DomName('WebSocket.WebSocket')
   @DocsEditable
   factory WebSocket(String url, [protocol_OR_protocols]) {
-    if ((url is String || url == null) && !?protocol_OR_protocols) {
+    if ((url is String || url == null) && protocol_OR_protocols == null) {
       return WebSocket._create_1(url);
     }
     if ((url is String || url == null) && (protocol_OR_protocols is List<String> || protocol_OR_protocols == null)) {
       return WebSocket._create_2(url, protocol_OR_protocols);
     }
     if ((url is String || url == null) && (protocol_OR_protocols is String || protocol_OR_protocols == null)) {
       return WebSocket._create_3(url, protocol_OR_protocols);
     }
     throw new ArgumentError("Incorrect number or type of arguments");
   }
@@ skipping 917 matching lines @@
   @DocsEditable
   @SupportedBrowser(SupportedBrowser.CHROME)
   @SupportedBrowser(SupportedBrowser.SAFARI)
   @Experimental
   @Creates('SqlDatabase')
   SqlDatabase openDatabase(String name, String version, String displayName, int estimatedSize, [DatabaseCallback creationCallback]) native;
 
   @DomName('Window.postMessage')
   @DocsEditable
   void postMessage(/*SerializedScriptValue*/ message, String targetOrigin, [List messagePorts]) {
-    if (?messagePorts) {
+    if (messagePorts != null) {
       var message_1 = convertDartToNative_SerializedScriptValue(message);
       _postMessage_1(message_1, targetOrigin, messagePorts);
       return;
     }
     var message_2 = convertDartToNative_SerializedScriptValue(message);
     _postMessage_2(message_2, targetOrigin);
     return;
   }
   @JSName('postMessage')
   @DomName('Window.postMessage')
@@ skipping 1290 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable
 @DomName('SharedWorker')
 abstract class _SharedWorker extends AbstractWorker native "SharedWorker" {
 
   @DomName('SharedWorker.SharedWorker')
   @DocsEditable
   factory _SharedWorker(String scriptURL, [String name]) {
-    if (?name) {
+    if (name != null) {
       return _SharedWorker._create_1(scriptURL, name);
     }
     return _SharedWorker._create_2(scriptURL);
   }
   static _SharedWorker _create_1(scriptURL, name) => JS('_SharedWorker', 'new SharedWorker(#,#)', scriptURL, name);
   static _SharedWorker _create_2(scriptURL) => JS('_SharedWorker', 'new SharedWorker(#)', scriptURL);
 }
 // 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 116 matching lines @@
 @DocsEditable
 @DomName('WebKitCSSMatrix')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 abstract class _WebKitCSSMatrix native "WebKitCSSMatrix" {
 
   @DomName('WebKitCSSMatrix.WebKitCSSMatrix')
   @DocsEditable
   factory _WebKitCSSMatrix([String cssValue]) {
-    if (?cssValue) {
+    if (cssValue != null) {
       return _WebKitCSSMatrix._create_1(cssValue);
     }
     return _WebKitCSSMatrix._create_2();
   }
   static _WebKitCSSMatrix _create_1(cssValue) => JS('_WebKitCSSMatrix', 'new WebKitCSSMatrix(#)', cssValue);
   static _WebKitCSSMatrix _create_2() => JS('_WebKitCSSMatrix', 'new WebKitCSSMatrix()');
 }
 // 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 3534 matching lines @@
       _position = nextPosition;
       return true;
     }
     _current = null;
     _position = _array.length;
     return false;
   }
 
   T get current => _current;
 }