Refactor content/renderer/accessibility to use AXTreeSerializer (re-land).

content/browser/renderer_host/render_view_host_impl.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/renderer_host/render_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 1926 matching lines @@
 
   // The rest of this code is just for testing; bail out if we're not
   // in that mode.
   if (accessibility_testing_callback_.is_null())
     return;
 
   for (unsigned i = 0; i < params.size(); i++) {
     const AccessibilityHostMsg_EventParams& param = params[i];
     if (static_cast<int>(param.event_type) < 0)
       continue;
-    ui::AXTreeUpdate update;
-    update.nodes = param.nodes;
     if (!ax_tree_)
-      ax_tree_.reset(new ui::AXTree(update));
+      ax_tree_.reset(new ui::AXTree(param.update));
     else
-      CHECK(ax_tree_->Unserialize(update)) << ax_tree_->error();
+      CHECK(ax_tree_->Unserialize(param.update)) << ax_tree_->error();
     accessibility_testing_callback_.Run(param.event_type);
   }
 }
 
 void RenderViewHostImpl::OnAccessibilityLocationChanges(
     const std::vector<AccessibilityHostMsg_LocationChangeParams>& params) {
   if (view_ && IsRVHStateActive(rvh_state_)) {
     view_->CreateBrowserAccessibilityManagerIfNeeded();
     BrowserAccessibilityManager* manager =
         view_->GetBrowserAccessibilityManager();
@@ skipping 136 matching lines @@
 void RenderViewHostImpl::AttachToFrameTree() {
   FrameTree* frame_tree = delegate_->GetFrameTree();
 
   frame_tree->ResetForMainFrameSwap();
   if (main_frame_id() != FrameTreeNode::kInvalidFrameId) {
     frame_tree->OnFirstNavigationAfterSwap(main_frame_id());
   }
 }
 
 }  // namespace content