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

chrome/renderer/extensions/automation_internal_custom_bindings.cc

 // 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.
 
 #include "chrome/renderer/extensions/automation_internal_custom_bindings.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ skipping 492 matching lines @@
   RouteTreeIDFunction("GetFocusAffinity", [](v8::Isolate* isolate,
                                            v8::ReturnValue<v8::Value> result,
                                            TreeCache* cache) {
     result.Set(CreateV8String(isolate,
           ToString(cache->tree.data().sel_focus_affinity)));
   });
 
   // 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,
                                           TreeCache* cache, ui::AXNode* node) {
     result.Set(v8::Integer::New(isolate, node->child_count()));
   });
   RouteNodeIDFunction(
       "GetIndexInParent",
       [](v8::Isolate* isolate, v8::ReturnValue<v8::Value> result,
          TreeCache* cache, ui::AXNode* node) {
@@ skipping 866 matching lines @@
   v8::Local<v8::Array> args(v8::Array::New(GetIsolate(), 2U));
   args->Set(0U, v8::Integer::New(GetIsolate(), tree_id));
   v8::Local<v8::Array> nodes(v8::Array::New(GetIsolate(), ids.size()));
   args->Set(1U, nodes);
   for (size_t i = 0; i < ids.size(); ++i)
     nodes->Set(i, v8::Integer::New(GetIsolate(), ids[i]));
   context()->DispatchEvent("automationInternal.onNodesRemoved", args);
 }
 
 }  // namespace extensions