Added Web SQL to the docs.json generation.

sdk/lib/web_sql/dart2js/web_sql_dart2js.dart

 library dart.dom.web_sql;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:html';
 import 'dart:html_common';
 import 'dart:_js_helper' show convertDartClosureToJS, Creates, JavaScriptIndexingBehavior, JSName;
 import 'dart:_foreign_helper' show JS;
 // DO NOT EDIT - unless you are editing documentation as per:
 // https://code.google.com/p/dart/wiki/ContributingHTMLDocumentation
@@ skipping 62 matching lines @@
 @Experimental
 class SqlDatabase 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;
 
+  /**
+   * Atomically update the database version to [newVersion], asynchronously
+   * running [callback] on the [SqlTransaction] representing this
+   * [changeVersion] transaction.
+   *
+   * If [callback] runs successfully, then [successCallback] is called.
+   * Otherwise, [errorCallback] is called.
+   *
+   * [oldVersion] should match the database's current [version] exactly.
+   *
+   * * [Database.changeVersion](http://www.w3.org/TR/webdatabase/#dom-database-changeversion) from W3C.
+   */
   @DomName('Database.changeVersion')
   @DocsEditable
   void changeVersion(String oldVersion, String newVersion, [SqlTransactionCallback callback, SqlTransactionErrorCallback errorCallback, VoidCallback successCallback]) native;
 
   @DomName('Database.readTransaction')
   @DocsEditable
   void readTransaction(SqlTransactionCallback callback, [SqlTransactionErrorCallback errorCallback, VoidCallback successCallback]) native;
 
   @DomName('Database.transaction')
   @DocsEditable
@@ skipping 348 matching lines @@
 @DomName('SQLTransactionSync')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 class SqlTransactionSync native "*SQLTransactionSync" {
 
   @DomName('SQLTransactionSync.executeSql')
   @DocsEditable
   SqlResultSet executeSql(String sqlStatement, List arguments) native;
 }