Revert "Making all DOM types abstract and removing superfluous Dartium constructors."

sdk/lib/web_sql/dartium/web_sql_dartium.dart

Index: sdk/lib/web_sql/dartium/web_sql_dartium.dart
diff --git a/sdk/lib/web_sql/dartium/web_sql_dartium.dart b/sdk/lib/web_sql/dartium/web_sql_dartium.dart
index 3c9afe503b846ccfca3ca65b6804b3c3816e031e..b057cc8d5a0597946b230cd50bcdd516a666e0d6 100644
--- a/sdk/lib/web_sql/dartium/web_sql_dartium.dart
+++ b/sdk/lib/web_sql/dartium/web_sql_dartium.dart
@@ -82,8 +82,7 @@ typedef void SqlTransactionErrorCallback(SqlError error);
 // http://www.w3.org/TR/webdatabase/#asynchronous-database-api
 @Experimental // deprecated
 class SqlDatabase extends NativeFieldWrapperClass1 {
-  // To suppress missing implicit constructor warnings.
-  factory SqlDatabase._() { throw new UnsupportedError("Not supported"); }
+  SqlDatabase.internal();
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => true;
@@ -129,8 +128,7 @@ class SqlDatabase extends NativeFieldWrapperClass1 {
 // http://www.w3.org/TR/webdatabase/#sqlerror
 @Experimental // deprecated
 class SqlError extends NativeFieldWrapperClass1 {
-  // To suppress missing implicit constructor warnings.
-  factory SqlError._() { throw new UnsupportedError("Not supported"); }
+  SqlError.internal();
 
   @DomName('SQLError.CONSTRAINT_ERR')
   @DocsEditable
@@ -185,8 +183,7 @@ class SqlError extends NativeFieldWrapperClass1 {
 // http://www.w3.org/TR/webdatabase/#sqlexception
 @Experimental // deprecated
 class SqlException extends NativeFieldWrapperClass1 {
-  // To suppress missing implicit constructor warnings.
-  factory SqlException._() { throw new UnsupportedError("Not supported"); }
+  SqlException.internal();
 
   @DomName('SQLException.CONSTRAINT_ERR')
   @DocsEditable
@@ -241,8 +238,7 @@ class SqlException extends NativeFieldWrapperClass1 {
 // http://www.w3.org/TR/webdatabase/#sqlresultset
 @Experimental // deprecated
 class SqlResultSet extends NativeFieldWrapperClass1 {
-  // To suppress missing implicit constructor warnings.
-  factory SqlResultSet._() { throw new UnsupportedError("Not supported"); }
+  SqlResultSet.internal();
 
   @DomName('SQLResultSet.insertId')
   @DocsEditable
@@ -269,8 +265,7 @@ class SqlResultSet extends NativeFieldWrapperClass1 {
 // http://www.w3.org/TR/webdatabase/#sqlresultsetrowlist
 @Experimental // deprecated
 class SqlResultSetRowList extends NativeFieldWrapperClass1 with ListMixin<Map>, ImmutableListMixin<Map> implements List<Map> {
-  // To suppress missing implicit constructor warnings.
-  factory SqlResultSetRowList._() { throw new UnsupportedError("Not supported"); }
+  SqlResultSetRowList.internal();
 
   @DomName('SQLResultSetRowList.length')
   @DocsEditable
@@ -341,8 +336,7 @@ class SqlResultSetRowList extends NativeFieldWrapperClass1 with ListMixin<Map>,
 // http://www.w3.org/TR/webdatabase/#sqltransaction
 @deprecated // deprecated
 class SqlTransaction extends NativeFieldWrapperClass1 {
-  // To suppress missing implicit constructor warnings.
-  factory SqlTransaction._() { throw new UnsupportedError("Not supported"); }
+  SqlTransaction.internal();
 
   @DomName('SQLTransaction.executeSql')
   @DocsEditable
@@ -364,7 +358,6 @@ class SqlTransaction extends NativeFieldWrapperClass1 {
 // http://www.w3.org/TR/webdatabase/#sqltransactionsync
 @Experimental // deprecated
 abstract class _SQLTransactionSync extends NativeFieldWrapperClass1 {
-  // To suppress missing implicit constructor warnings.
-  factory _SQLTransactionSync._() { throw new UnsupportedError("Not supported"); }
+  _SQLTransactionSync.internal();
 
 }