Fix accessibility with out-of-process iframes.

content/public/test/browser_test_utils.cc

Index: content/public/test/browser_test_utils.cc
diff --git a/content/public/test/browser_test_utils.cc b/content/public/test/browser_test_utils.cc
index 001ceeaab81a8e46bfd863aba448a2d735da27fb..55fa908ad9b0eba9b2d02ed0366cce04c0a301aa 100644
--- a/content/public/test/browser_test_utils.cc
+++ b/content/public/test/browser_test_utils.cc
@@ -1013,4 +1013,39 @@ void FrameWatcher::WaitFrames(int 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