Fix accessibility with out-of-process iframes.

content/public/test/browser_test_utils.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/public/test/browser_test_utils.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
@@ skipping 995 matching lines @@
 
 void FrameWatcher::WaitFrames(int frames_to_wait) {
   if (frames_to_wait <= 0)
     return;
   base::RunLoop run_loop;
   base::AutoReset<base::Closure> reset_quit(&quit_, run_loop.QuitClosure());
   base::AutoReset<int> reset_frames_to_wait(&frames_to_wait_, frames_to_wait);
   run_loop.Run();
 }
 
+RenderFrameDeletedObserver::RenderFrameDeletedObserver(
+    RenderFrameHost* rfh)
+    : WebContentsObserver(WebContents::FromRenderFrameHost(rfh)),
+      process_id_(rfh->GetProcess()->GetID()),
+      routing_id_(rfh->GetRoutingID()),
+      deleted_(false) {
+}
+
+RenderFrameDeletedObserver::~RenderFrameDeletedObserver() {
+}
+
+void RenderFrameDeletedObserver::RenderFrameDeleted(
+    RenderFrameHost* render_frame_host) {
+  if (render_frame_host->GetProcess()->GetID() == process_id_ &&
+      render_frame_host->GetRoutingID() == routing_id_) {
+    deleted_ = true;
+
+    if (runner_.get())
+      runner_->Quit();
+  }
+}
+
+bool RenderFrameDeletedObserver::deleted() {
+  return deleted_;
+}
+
+void RenderFrameDeletedObserver::WaitUntilDeleted() {
+  if (deleted_)
+    return;
+
+  runner_.reset(new base::RunLoop());
+  runner_->Run();
+  runner_.reset(nullptr);
+}
+
 }  // namespace content