Add a window property to associate RWHVA with its child AX tree ID

content/browser/frame_host/render_frame_host_impl.cc

 // Copyright 2013 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/frame_host/render_frame_host_impl.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 1955 matching lines @@
   // IPC doesn't have the matching token ID, or if we're not waiting on a
   // reset but this message includes a reset token.
   if (accessibility_reset_token_ != reset_token) {
     Send(new AccessibilityMsg_Events_ACK(routing_id_, ack_token));
     return;
   }
   accessibility_reset_token_ = 0;
 
   RenderWidgetHostViewBase* view = GetViewForAccessibility();
 
+  if (frame_tree_node_->IsMainFrame() && view)
+    view->SetMainFrameAXTreeID(GetAXTreeID());
+
   AccessibilityMode accessibility_mode = delegate_->GetAccessibilityMode();
   if ((accessibility_mode != AccessibilityModeOff) && view && is_active()) {
     if (accessibility_mode & ACCESSIBILITY_MODE_FLAG_NATIVE_APIS)
       GetOrCreateBrowserAccessibilityManager();
 
     std::vector<AXEventNotificationDetails> details;
     details.reserve(params.size());
     for (size_t i = 0; i < params.size(); ++i) {
       const AccessibilityHostMsg_EventParams& param = params[i];
       AXEventNotificationDetails detail;
@@ skipping 1489 matching lines @@
           GetUserData(kRenderFrameHostAndroidKey));
   if (!render_frame_host_android) {
     render_frame_host_android = new RenderFrameHostAndroid(this);
     SetUserData(kRenderFrameHostAndroidKey, render_frame_host_android);
   }
   return render_frame_host_android->GetJavaObject();
 }
 #endif
 
 }  // namespace content