Avoid enabling accessibility for WebContents that are never shown

content/browser/frame_host/interstitial_page_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/interstitial_page_impl.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 228 matching lines @@
         ->DidChangeVisibleSecurityState();
   }
 
   DCHECK(!render_view_host_);
   render_view_host_ = CreateRenderViewHost();
   CreateWebContentsView();
 
   GURL data_url = GURL("data:text/html;charset=utf-8," +
                        net::EscapePath(delegate_->GetHTMLContents()));
   frame_tree_.root()->current_frame_host()->NavigateToInterstitialURL(data_url);
-  frame_tree_.root()->current_frame_host()->SetAccessibilityMode(
-      GetAccessibilityMode());
+  frame_tree_.root()->current_frame_host()->UpdateAccessibilityMode();
 
   notification_registrar_.Add(this, NOTIFICATION_NAV_ENTRY_PENDING,
       Source<NavigationController>(controller_));
 }
 
 void InterstitialPageImpl::Hide() {
   // We may have already been hidden, and are just waiting to be deleted.
   // We can't check for enabled() here, because some callers have already
   // called Disable.
   if (!render_view_host_)
@@ skipping 692 matching lines @@
 void InterstitialPageImpl::UpdateDeviceScaleFactor(double device_scale_factor) {
   WebContentsImpl* web_contents_impl =
       static_cast<WebContentsImpl*>(web_contents_);
   if (!web_contents_impl)
     return;
 
   web_contents_impl->UpdateDeviceScaleFactor(device_scale_factor);
 }
 
 }  // namespace content