Uses mojom module names as Dart's package: import URI

mojo/services/accessibility/public/interfaces/accessibility.mojom

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+[DartUriBase="mojo/services/accessibility/public/interfaces"]
 module mojo;
 
 import "geometry/public/interfaces/geometry.mojom";
 
 interface AxProvider {
   GetTree() => (array<AxNode> nodes);
 };
 
 struct AxNode {
   // Must be non-zero.
@@ skipping 11 matching lines @@
   AxText? text;
 };
 
 struct AxLink {
   string url;
 };
 
 struct AxText {
   string content;
 };