Revert of Fix accessibility with out-of-process iframes.

content/public/test/browser_test_utils.h

Index: content/public/test/browser_test_utils.h
diff --git a/content/public/test/browser_test_utils.h b/content/public/test/browser_test_utils.h
index 40b56a82146d19708b67ff54d37fa134694dada4..7de4fd7fcd1c14eeab59fc51e8498223d1a1ed6d 100644
--- a/content/public/test/browser_test_utils.h
+++ b/content/public/test/browser_test_utils.h
@@ -434,25 +434,6 @@
   DISALLOW_COPY_AND_ASSIGN(FrameWatcher);
 };
 
-// This observer keeps track of the last deleted RenderFrame to avoid
-// accessing it and causing use-after-free condition.
-class RenderFrameDeletedObserver : public WebContentsObserver {
- public:
-  RenderFrameDeletedObserver(RenderFrameHost* rfh);
-  ~RenderFrameDeletedObserver() override;
-  void RenderFrameDeleted(RenderFrameHost* render_frame_host) override;
-  bool deleted();
-  void WaitUntilDeleted();
-
- private:
-  int process_id_;
-  int routing_id_;
-  bool deleted_;
-  scoped_ptr<base::RunLoop> runner_;
-
-  DISALLOW_COPY_AND_ASSIGN(RenderFrameDeletedObserver);
-};
-
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_