Automation API: Get rid of host node and get parent from C++ bindings instead

chrome/renderer/extensions/automation_internal_custom_bindings.cc

Index: chrome/renderer/extensions/automation_internal_custom_bindings.cc
diff --git a/chrome/renderer/extensions/automation_internal_custom_bindings.cc b/chrome/renderer/extensions/automation_internal_custom_bindings.cc
index 9cba94914646b0fde747577e1842af2f740fa0d6..f7d955dd835543bb2b15e7692574b38f57c3ee2f 100644
--- a/chrome/renderer/extensions/automation_internal_custom_bindings.cc
+++ b/chrome/renderer/extensions/automation_internal_custom_bindings.cc
@@ -510,10 +510,15 @@ AutomationInternalCustomBindings::AutomationInternalCustomBindings(
   // Bindings that take a Tree ID and Node ID and return a property of the node.
 
   RouteNodeIDFunction(
-      "GetParentID", [](v8::Isolate* isolate, v8::ReturnValue<v8::Value> result,
-                        TreeCache* cache, ui::AXNode* node) {
-        if (node->parent())
-          result.Set(v8::Integer::New(isolate, node->parent()->id()));
+      "GetParent", [](v8::Isolate* isolate, v8::ReturnValue<v8::Value> result,
+                      TreeCache* cache, ui::AXNode* node) {
+        ui::AXNode* parent = cache->owner->GetParent(node, &cache);
+        int parent_node_id = parent->id();
+        int parent_tree_id = cache->tree_id;
+        v8::Local<v8::Array> array_result(v8::Array::New(isolate, 2));
+        array_result->Set(0, v8::Integer::New(isolate, parent_tree_id));
+        array_result->Set(1, v8::Integer::New(isolate, parent_node_id));
+        result.Set(array_result);
       });
   RouteNodeIDFunction("GetChildCount", [](v8::Isolate* isolate,
                                           v8::ReturnValue<v8::Value> result,