Keep track of fixed positioning in accessibility tree.

content/browser/accessibility/dump_accessibility_browsertest_base.cc

Index: content/browser/accessibility/dump_accessibility_browsertest_base.cc
diff --git a/content/browser/accessibility/dump_accessibility_browsertest_base.cc b/content/browser/accessibility/dump_accessibility_browsertest_base.cc
index 90025bcd07683a2c3bd74d00978927935ba16a71..9250887607e7f69f2d38a84b6f98c9cce4b8bb5f 100644
--- a/content/browser/accessibility/dump_accessibility_browsertest_base.cc
+++ b/content/browser/accessibility/dump_accessibility_browsertest_base.cc
@@ -347,6 +347,17 @@ void DumpAccessibilityTestBase::RunTestForPlatform(
     accessibility_waiter.WaitForNotification();
   }
 
+  {
+    LOG(ERROR) << "***";
+    LOG(ERROR) << "***";
+    LOG(ERROR) << "***";
+    RenderFrameHostImpl* main_frame =
+        static_cast<RenderFrameHostImpl*>(web_contents->GetMainFrame());
+    BrowserAccessibilityManager* manager =
+        main_frame->browser_accessibility_manager();
+    LOG(ERROR) << manager->SnapshotAXTreeForTesting().ToString();
+  }
+
   // Call the subclass to dump the output.
   std::vector<std::string> actual_lines = Dump();