Added Web SQL to the docs.json generation.

tools/dom/docs/docs.json

 {
   "dart.dom.html": {
     "CanvasGradient": {
       "comment": [
         "/**",
         " * An opaque canvas object representing a gradient.",
         " *",
         " * Created by calling [createLinearGradient] or [createRadialGradient] on a",
         " * [CanvasRenderingContext2D] object.",
         " *",
@@ skipping 510 matching lines @@
           "   *     request.on.load.add((event) => print('Request complete'));",
           "   *",
           "   * is the (more verbose) equivalent of",
           "   *",
           "   *     var request = new HttpRequest.get('http://dartlang.org',",
           "   *         (event) => print('Request complete'));",
           "   */"
         ]
       }
     }
+  },
+  "dart.dom.web_sql": {
+    "Database": {
+      "members": {
+        "changeVersion": [
+          "/**",
+          "   * 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.",
+          "   */"
+        ]
+      }
+    }
   }
 }