Expand Chrome OS ARC support to create one tree source per package

components/arc/common/accessibility_helper.mojom

 // Copyright 2017 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.
 
-// Next MinVersion: 2
+// Next MinVersion: 3
 
 module arc.mojom;
 
 import "screen_rect.mojom";
 
 // For future maintainers, each of the below enums were hand picked
 // from their equivalents in the Android source. Keep them in the
 // order given below and add as needed. The initial order matches the
 // order they appear in source files.
 
@@ skipping 133 matching lines @@
 // accessibility service.
 [Extensible]
 enum AccessibilityFilterType {
   // No events will be sent.
   OFF,
 
   // Only send focus events along with the source focus node.
   FOCUS,
 
   // Send a complete tree from the event source's root for every event.
-  ALL
+  ALL,
+
+  // Send complete subtrees for root nodes with whitelisted package names.
+  [MinVersion=2]WHITELISTED_PACKAGE_NAME
 };
 
 // AccessibilityEventData is a struct to contain info of
 // AccessibilityEvent in Android.
 // https://developer.android.com/reference/android/view/accessibility/AccessibilityEvent.html
 struct AccessibilityEventData {
   AccessibilityEventType eventType;
   int32 sourceId;
   array<AccessibilityNodeInfoData> nodeData;
 };
@@ skipping 11 matching lines @@
 // Next method ID: 3
 interface AccessibilityHelperInstance {
   Init@0(AccessibilityHelperHost host);
 
   // Perform the specified action on a node requested by a Chrome client.
   PerformAction@1(int32 id, AccessibilityActionType action);
 
   // Set a filter on the event types received.
   SetFilter@2(AccessibilityFilterType filterType);
 };