Make AccessibilityNodeData more compact.

content/renderer/accessibility/renderer_accessibility_complete.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/renderer/accessibility/renderer_accessibility_complete.h"
 
 #include <queue>
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 387 matching lines @@
 
   AccessibilityHostMsg_NotificationParams notification_msg;
   notification_msg.notification_type =
       static_cast<AccessibilityNotification>(-1);
   notification_msg.id = root_object.axID();
   notification_msg.nodes.resize(location_changes.size());
   for (size_t i = 0; i < location_changes.size(); i++) {
     AccessibilityNodeData& serialized_node = notification_msg.nodes[i];
     serialized_node.id = location_changes[i]->id;
     serialized_node.location = location_changes[i]->location;
-    serialized_node.bool_attributes[
-        AccessibilityNodeData::ATTR_UPDATE_LOCATION_ONLY] = true;
+    serialized_node.AddBoolAttribute(
+        AccessibilityNodeData::ATTR_UPDATE_LOCATION_ONLY, true);
   }
 
   notification_msgs->push_back(notification_msg);
 }
 
 RendererAccessibilityComplete::BrowserTreeNode*
 RendererAccessibilityComplete::CreateBrowserTreeNode() {
   return new RendererAccessibilityComplete::BrowserTreeNode();
 }
 
@@ skipping 284 matching lines @@
     render_view()->GetWebView()->clearFocusedNode();
   else
     obj.setFocused(true);
 }
 
 void RendererAccessibilityComplete::OnFatalError() {
   CHECK(false) << "Invalid accessibility tree.";
 }
 
 }  // namespace content