Adding supported checks & test for SpeechRecognition APIs.

sdk/lib/html/dartium/html_dartium.dart

Index: sdk/lib/html/dartium/html_dartium.dart
diff --git a/sdk/lib/html/dartium/html_dartium.dart b/sdk/lib/html/dartium/html_dartium.dart
index 66a501427367b8ac2d10028bb755ba41faf862d1..2fd03075ed50deb452e1bff53eac5b5b5c0bd7f9 100644
--- a/sdk/lib/html/dartium/html_dartium.dart
+++ b/sdk/lib/html/dartium/html_dartium.dart
@@ -10699,8 +10699,25 @@ class Event extends NativeFieldWrapperClass1 {
   //
   // Contrary to JS, we default canBubble and cancelable to true, since that's
   // what people want most of the time anyway.
-  factory Event(String type, [bool canBubble = true, bool cancelable = true]) =>
-      _EventFactoryProvider.createEvent(type, canBubble, cancelable);
+  factory Event(String type,
+      [bool canBubble = true, bool cancelable = true]) {
+    return new Event.eventType('Event', type, canBubble, cancelable);
+  }
+
+  /**
+   * Creates a new Event object of the specified type.
+   *
+   * This is analogous to document.createEvent.
+   * Normally events should be created via their constructors, if available.
+   *
+   *     var e = new Event.type('MouseEvent', 'mousedown', true, true);
+   */
+  factory Event.eventType(String type, String name, [bool canBubble = true,
+      bool cancelable = true]) {
+    final Event e = document.$dom_createEvent(type);
+    e.$dom_initEvent(name, canBubble, cancelable);
+    return e;
+  }
   Event.internal();
 
   static const int AT_TARGET = 2;
@@ -22062,6 +22079,8 @@ class SpeechInputResult extends NativeFieldWrapperClass1 {
 
 @DocsEditable
 @DomName('SpeechRecognition')
+@SupportedBrowser(SupportedBrowser.CHROME, '25')
+@Experimental()
 class SpeechRecognition extends EventTarget {
   SpeechRecognition.internal() : super.internal();
 
@@ -22113,6 +22132,9 @@ class SpeechRecognition extends EventTarget {
   factory SpeechRecognition() => SpeechRecognition._create();
   static SpeechRecognition _create() native "SpeechRecognition_constructor_Callback";
 
+  /// Checks if this type is supported on the current platform.
+  static bool get supported => true;
+
   @DocsEditable
   @DomName('EventTarget.addEventListener, EventTarget.removeEventListener, EventTarget.dispatchEvent')
   SpeechRecognitionEvents get on =>
@@ -22275,6 +22297,8 @@ class SpeechRecognitionEvents extends Events {
 
 @DocsEditable
 @DomName('SpeechRecognitionAlternative')
+@SupportedBrowser(SupportedBrowser.CHROME, '25')
+@Experimental()
 class SpeechRecognitionAlternative extends NativeFieldWrapperClass1 {
   SpeechRecognitionAlternative.internal();
 
@@ -22296,6 +22320,8 @@ class SpeechRecognitionAlternative extends NativeFieldWrapperClass1 {
 
 @DocsEditable
 @DomName('SpeechRecognitionError')
+@SupportedBrowser(SupportedBrowser.CHROME, '25')
+@Experimental()
 class SpeechRecognitionError extends Event {
   SpeechRecognitionError.internal() : super.internal();
 
@@ -22317,6 +22343,8 @@ class SpeechRecognitionError extends Event {
 
 @DocsEditable
 @DomName('SpeechRecognitionEvent')
+@SupportedBrowser(SupportedBrowser.CHROME, '25')
+@Experimental()
 class SpeechRecognitionEvent extends Event {
   SpeechRecognitionEvent.internal() : super.internal();
 
@@ -22346,6 +22374,8 @@ class SpeechRecognitionEvent extends Event {
 
 @DocsEditable
 @DomName('SpeechRecognitionResult')
+@SupportedBrowser(SupportedBrowser.CHROME, '25')
+@Experimental()
 class SpeechRecognitionResult extends NativeFieldWrapperClass1 {
   SpeechRecognitionResult.internal();