Use BrowserAccessibilityComWin::Destroy to clear delegate and owner.

content/browser/accessibility/browser_accessibility_win.cc

Index: content/browser/accessibility/browser_accessibility_win.cc
diff --git a/content/browser/accessibility/browser_accessibility_win.cc b/content/browser/accessibility/browser_accessibility_win.cc
index 0fe7041a46e7e8c6f55d62f46a395233b2ec9fa1..6231a10460764f9aa0ed96c3c8fee5392a1c4e17 100644
--- a/content/browser/accessibility/browser_accessibility_win.cc
+++ b/content/browser/accessibility/browser_accessibility_win.cc
@@ -36,10 +36,7 @@ void BrowserAccessibilityWin::UpdatePlatformAttributes() {
 
 void BrowserAccessibilityWin::Destroy() {
   if (browser_accessibility_com_) {
-    browser_accessibility_com_->SetOwner(nullptr);
-    // TODO(dougt) AXPlatformNode::Reset
-    browser_accessibility_com_->Init(nullptr);
-    browser_accessibility_com_->Release();
+    browser_accessibility_com_->Destroy();
     browser_accessibility_com_ = nullptr;
   }
   BrowserAccessibility::Destroy();