Keep track of fixed positioning in accessibility tree.

content/browser/accessibility/dump_accessibility_browsertest_base.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 "content/browser/accessibility/dump_accessibility_browsertest_base.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 329 matching lines @@
 
     // Block until the next accessibility notification in any frame.
     VLOG(1) << "Waiting until the next accessibility event";
     AccessibilityNotificationWaiter accessibility_waiter(main_frame,
                                                          ui::AX_EVENT_NONE);
     for (FrameTreeNode* node : frame_tree->Nodes())
       accessibility_waiter.ListenToAdditionalFrame(node->current_frame_host());
     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();
 
   // Perform a diff (or write the initial baseline).
   std::vector<std::string> expected_lines = base::SplitString(
       expected_contents, "\n", base::KEEP_WHITESPACE,
       base::SPLIT_WANT_NONEMPTY);
   // Marking the end of the file with a line of text ensures that
   // file length differences are found.
   expected_lines.push_back(kMarkEndOfFile);
@@ skipping 37 matching lines @@
             static_cast<int>(actual_contents.size()));
       LOG(INFO) << "Wrote expectations to: "
                 << expected_file.LossyDisplayName();
     }
   } else {
     LOG(INFO) << "Test output matches expectations.";
   }
 }
 
 }  // namespace content