Don't send focus accessibility events when tab isn't focused.

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 "base/logging.h"
 #include "build/build_config.h"
@@ skipping 171 matching lines @@
   update.nodes.push_back(empty_document);
   return update;
 }
 
 void BrowserAccessibilityManager::FireFocusEventsIfNeeded() {
   BrowserAccessibility* focus = GetFocus();
 
   // Don't fire focus events if the window itself doesn't have focus.
   // Bypass this check if a global focus listener was set up for testing
   // so that the test passes whether the window is active or not.
-  if (!g_focus_change_callback_for_testing.Pointer()) {
+  if (g_focus_change_callback_for_testing.Get().is_null()) {
     if (delegate_ && !delegate_->AccessibilityViewHasFocus())
       focus = nullptr;
 
     if (!CanFireEvents())
       focus = nullptr;
   }
 
   // Don't allow the document to be focused if it has no children and
   // hasn't finished loading yet. Wait for at least a tiny bit of content,
   // or for the document to actually finish loading.
@@ skipping 673 matching lines @@
       tree_source(tree_->CreateTreeSource());
   ui::AXTreeSerializer<const ui::AXNode*,
                        ui::AXNodeData,
                        ui::AXTreeData> serializer(tree_source.get());
   ui::AXTreeUpdate update;
   serializer.SerializeChanges(tree_->root(), &update);
   return update;
 }
 
 }  // namespace content