Keep track of fixed positioning in accessibility tree.

content/browser/accessibility/browser_accessibility_manager.cc

 // Copyright (c) 2012 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/browser_accessibility_manager.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/logging.h"
@@ skipping 455 matching lines @@
 
 void BrowserAccessibilityManager::OnLocationChanges(
     const std::vector<AccessibilityHostMsg_LocationChangeParams>& params) {
   for (size_t i = 0; i < params.size(); ++i) {
     BrowserAccessibility* obj = GetFromID(params[i].id);
     if (!obj)
       continue;
     ui::AXNode* node = obj->node();
     node->SetLocation(params[i].new_location.offset_container_id,
                       params[i].new_location.bounds,
-                      params[i].new_location.transform.get());
+                      params[i].new_location.transform.get(),
+                      params[i].new_location.is_fixed_positioned);
   }
   SendLocationChangeEvents(params);
 }
 
 void BrowserAccessibilityManager::SendLocationChangeEvents(
     const std::vector<AccessibilityHostMsg_LocationChangeParams>& params) {
   for (size_t i = 0; i < params.size(); ++i) {
     BrowserAccessibility* obj = GetFromID(params[i].id);
     if (obj)
       obj->OnLocationChanged();
@@ skipping 825 matching lines @@
       hit_test_result = parent;
     parent = parent->PlatformGetParent();
   }
 
   last_hover_ax_tree_id_ = hit_test_result->manager()->ax_tree_id();
   last_hover_node_id_ = hit_test_result->GetId();
   last_hover_bounds_ = hit_test_result->GetScreenBoundsRect();
 }
 
 }  // namespace content