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

components/arc/common/accessibility_helper.mojom

Index: components/arc/common/accessibility_helper.mojom
diff --git a/components/arc/common/accessibility_helper.mojom b/components/arc/common/accessibility_helper.mojom
index d80b7355993d7e2e21eef62df5b15d09fd3ff340..c2e2bb04b373f175a0c5be86f273160e5d4f0c6a 100644
--- a/components/arc/common/accessibility_helper.mojom
+++ b/components/arc/common/accessibility_helper.mojom
@@ -156,7 +156,10 @@ enum AccessibilityFilterType {
   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.
+  WHITELISTED_PACKAGE_NAME
 };
 
 // AccessibilityEventData is a struct to contain info of
@@ -168,7 +171,7 @@ struct AccessibilityEventData {
   array<AccessibilityNodeInfoData> nodeData;
 };
 
-// Next method ID: 2
+// Next method ID: 3
 interface AccessibilityHelperHost {
   OnAccessibilityEventDeprecated@0(AccessibilityEventType eventType,
                                    AccessibilityNodeInfoData? eventSource);