Simplify win32 platform node delegate GetParent

shell/platform/windows/accessibility_bridge_delegate_win32_unittests.cc

@@ -163,6 +163,36 @@ void ExpectWinEventFromAXEvent(int32_t node_id,
 
 }  // namespace
 
+TEST(AccessibilityBridgeDelegateWin32, GetParent) {
+  auto window_binding_handler =
+      std::make_unique<::testing::NiceMock<MockWindowBindingHandler>>();
+  FlutterWindowsView view(std::move(window_binding_handler));
+  view.SetEngine(GetTestEngine());
+  view.OnUpdateSemanticsEnabled(true);
+
+  auto bridge = view.GetEngine()->accessibility_bridge().lock();
+  PopulateAXTree(bridge);
+
+  auto node0_delegate = bridge->GetFlutterPlatformNodeDelegateFromID(0).lock();
+  auto node1_delegate = bridge->GetFlutterPlatformNodeDelegateFromID(1).lock();
+  EXPECT_EQ(node0_delegate->GetNativeViewAccessible(),
+            node1_delegate->GetParent());
+}
+
+TEST(AccessibilityBridgeDelegateWin32, GetParentOnRootRetunsNullptr) {
+  auto window_binding_handler =
+      std::make_unique<::testing::NiceMock<MockWindowBindingHandler>>();
+  FlutterWindowsView view(std::move(window_binding_handler));
+  view.SetEngine(GetTestEngine());
+  view.OnUpdateSemanticsEnabled(true);
+
+  auto bridge = view.GetEngine()->accessibility_bridge().lock();
+  PopulateAXTree(bridge);
+
+  auto node0_delegate = bridge->GetFlutterPlatformNodeDelegateFromID(0).lock();
+  ASSERT_TRUE(node0_delegate->GetParent() == nullptr);
+}
+
 TEST(AccessibilityBridgeDelegateWin32, NodeDelegateHasUniqueId) {
   auto window_binding_handler =
       std::make_unique<::testing::NiceMock<MockWindowBindingHandler>>();

shell/platform/windows/flutter_platform_node_delegate_win32.cc

@@ -37,31 +37,6 @@ FlutterPlatformNodeDelegateWin32::GetNativeViewAccessible() {
   return ax_platform_node_->GetNativeViewAccessible();
 }
 
-// |FlutterPlatformNodeDelegate|
-gfx::NativeViewAccessible FlutterPlatformNodeDelegateWin32::GetParent() {
-  gfx::NativeViewAccessible parent = FlutterPlatformNodeDelegate::GetParent();
-  if (parent) {
-    return parent;
-  }
-  assert(engine_);
-  FlutterWindowsView* view = engine_->view();
-  if (!view) {
-    return nullptr;
-  }
-  HWND hwnd = view->GetPlatformWindow();
-  if (!hwnd) {
-    return nullptr;
-  }
-
-  IAccessible* iaccessible_parent;
-  if (SUCCEEDED(::AccessibleObjectFromWindow(
-          hwnd, OBJID_WINDOW, IID_IAccessible,
-          reinterpret_cast<void**>(&iaccessible_parent)))) {
-    return iaccessible_parent;
-  }
-  return nullptr;
-}
-
 // |FlutterPlatformNodeDelegate|
 gfx::Rect FlutterPlatformNodeDelegateWin32::GetBoundsRect(
     const ui::AXCoordinateSystem coordinate_system,

shell/platform/windows/flutter_platform_node_delegate_win32.h

@@ -29,9 +29,6 @@ class FlutterPlatformNodeDelegateWin32 : public FlutterPlatformNodeDelegate {
   // |ui::AXPlatformNodeDelegate|
   gfx::NativeViewAccessible GetNativeViewAccessible() override;
 
-  // |FlutterPlatformNodeDelegate|
-  gfx::NativeViewAccessible GetParent() override;
-
   // |FlutterPlatformNodeDelegate|
   gfx::Rect GetBoundsRect(
       const ui::AXCoordinateSystem coordinate_system,