sdk/lib/html/dart2js/html_dart2js.dart

Index: sdk/lib/html/dart2js/html_dart2js.dart
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index e1340e28788fdb9e9865eb1eb867808bbfe2a2f4..b940de72c2d61b428276ef0b5e37a006d3c21805 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -5819,8 +5819,14 @@ class DataView extends ArrayBufferView native "*DataView" {
 
 @DocsEditable
 @DomName('Database')
+@SupportedBrowser(SupportedBrowser.CHROME)
+@SupportedBrowser(SupportedBrowser.SAFARI)
+@Experimental
 class Database native "*Database" {
 
+  /// Checks if this type is supported on the current platform.
+  static bool get supported => JS('bool', '!!(window.openDatabase)');
+
   @DomName('Database.version')
   @DocsEditable
   final String version;
@@ -5852,6 +5858,9 @@ typedef void DatabaseCallback(database);
 
 @DocsEditable
 @DomName('DatabaseSync')
+@SupportedBrowser(SupportedBrowser.CHROME)
+@SupportedBrowser(SupportedBrowser.SAFARI)
+@Experimental
 class DatabaseSync native "*DatabaseSync" {
 
   @DomName('DatabaseSync.lastErrorMessage')
@@ -20779,6 +20788,9 @@ class SqlResultSetRowList implements JavaScriptIndexingBehavior, List<Map> nativ
 
 @DocsEditable
 @DomName('SQLTransaction')
+@SupportedBrowser(SupportedBrowser.CHROME)
+@SupportedBrowser(SupportedBrowser.SAFARI)
+@Experimental
 class SqlTransaction native "*SQLTransaction" {
 
   @DomName('SQLTransaction.executeSql')
@@ -20792,6 +20804,9 @@ class SqlTransaction native "*SQLTransaction" {
 
 @DocsEditable
 @DomName('SQLTransactionSync')
+@SupportedBrowser(SupportedBrowser.CHROME)
+@SupportedBrowser(SupportedBrowser.SAFARI)
+@Experimental
 class SqlTransactionSync native "*SQLTransactionSync" {
 
   @DomName('SQLTransactionSync.executeSql')
@@ -26030,6 +26045,9 @@ class Window extends EventTarget implements WindowBase native "@*DOMWindow" {
 
   @DomName('DOMWindow.openDatabase')
   @DocsEditable
+  @SupportedBrowser(SupportedBrowser.CHROME)
+  @SupportedBrowser(SupportedBrowser.SAFARI)
+  @Experimental
   @Creates('Database')
   @Creates('DatabaseSync')
   Database openDatabase(String name, String version, String displayName, int estimatedSize, [DatabaseCallback creationCallback]) native;
@@ -26698,10 +26716,16 @@ class WorkerContext extends EventTarget native "*WorkerContext" {
 
   @DomName('WorkerContext.openDatabase')
   @DocsEditable
+  @SupportedBrowser(SupportedBrowser.CHROME)
+  @SupportedBrowser(SupportedBrowser.SAFARI)
+  @Experimental
   Database openDatabase(String name, String version, String displayName, int estimatedSize, [DatabaseCallback creationCallback]) native;
 
   @DomName('WorkerContext.openDatabaseSync')
   @DocsEditable
+  @SupportedBrowser(SupportedBrowser.CHROME)
+  @SupportedBrowser(SupportedBrowser.SAFARI)
+  @Experimental
   DatabaseSync openDatabaseSync(String name, String version, String displayName, int estimatedSize, [DatabaseCallback creationCallback]) native;
 
   @JSName('removeEventListener')