Migrate BrowserAccessibility windows unique id handling to AXPlatformNodeWin.

content/browser/accessibility/browser_accessibility_win_unittest.cc

Index: content/browser/accessibility/browser_accessibility_win_unittest.cc
diff --git a/content/browser/accessibility/browser_accessibility_win_unittest.cc b/content/browser/accessibility/browser_accessibility_win_unittest.cc
index d42255a72ded205cb390a81d170f74344ff837f9..d66c322abfa6b8f1c4d40cc73455e1ca197eb8c7 100644
--- a/content/browser/accessibility/browser_accessibility_win_unittest.cc
+++ b/content/browser/accessibility/browser_accessibility_win_unittest.cc
@@ -733,8 +733,15 @@ TEST_F(BrowserAccessibilityTest, EmptyDocHasUniqueIdWin) {
   EXPECT_EQ(1 << ui::AX_STATE_BUSY | 1 << ui::AX_STATE_READ_ONLY,
             root->GetState());
 
-  int32_t unique_id = ToBrowserAccessibilityWin(root)->unique_id();
-  ASSERT_EQ(root, BrowserAccessibility::GetFromUniqueID(unique_id));
+  BrowserAccessibilityWin* win_root = ToBrowserAccessibilityWin(root);
+
+  int32_t unique_id = win_root->unique_id();
+  ui::AXPlatformNode* node = static_cast<ui::AXPlatformNode*>(
+      ui::AXPlatformNode::GetFromUniqueId(unique_id));
+
+  ui::AXPlatformNode* other_node =
+      static_cast<ui::AXPlatformNode*>(win_root->GetCOM());
+  ASSERT_EQ(node, other_node);
 }
 
 TEST_F(BrowserAccessibilityTest, TestIA2Attributes) {