Revert of Cross-process iframe accessibility.

content/test/accessibility_browser_test_utils.h

Index: content/test/accessibility_browser_test_utils.h
diff --git a/content/test/accessibility_browser_test_utils.h b/content/test/accessibility_browser_test_utils.h
index 6f3e69cb4161a92a653d449afe3419b3f4717907..f1a88a4a117c400b15ae05b2fb48ce9eadca73b4 100644
--- a/content/test/accessibility_browser_test_utils.h
+++ b/content/test/accessibility_browser_test_utils.h
@@ -28,9 +28,6 @@
       Shell* shell,
       AccessibilityMode accessibility_mode,
       ui::AXEvent event);
-  AccessibilityNotificationWaiter(
-      RenderFrameHostImpl* frame_host,
-       ui::AXEvent event);
   ~AccessibilityNotificationWaiter();
 
   // Blocks until the specific accessibility notification registered in
@@ -54,6 +51,7 @@
   // GetAXTree() is about the page with the url "about:blank".
   bool IsAboutBlank();
 
+  Shell* shell_;
   RenderFrameHostImpl* frame_host_;
   ui::AXEvent event_to_wait_for_;
   scoped_refptr<MessageLoopRunner> loop_runner_;