ABANDONED CL: WaitForChildFrameSurfaceReady to avoid flaky test hangs.

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 2d9832d0cb562ed2b15ea419fc781e6449986953..fba44e91f79dbbea9d9c91f79ae9005c62f57772 100644
--- a/content/public/test/browser_test_utils.h
+++ b/content/public/test/browser_test_utils.h
@@ -339,13 +339,19 @@ void SendRoutedTouchTapSequence(content::WebContents* web_contents,
 // RenderWidgetHostViewAura.
 void SendRoutedGestureTapSequence(content::WebContents* web_contents,
                                   gfx::Point point);
-//
+
 // Waits until the cc::Surface associated with a guest/cross-process-iframe
 // has been drawn for the first time. Once this method returns it should be
 // safe to assume that events sent to the top-level RenderWidgetHostView can
 // be expected to properly hit-test to this surface, if appropriate.
 void WaitForGuestSurfaceReady(content::WebContents* web_contents);
 
+// Waits until the cc::Surface associated with a cross-process child frame
+// has been drawn for the first time. Once this method returns it should be
+// safe to assume that events sent to the top-level RenderWidgetHostView can
+// be expected to properly hit-test to this surface, if appropriate.
+void WaitForChildFrameSurfaceReady(content::RenderFrameHost* child_frame);
+
 #endif
 
 // Watches title changes on a WebContents, blocking until an expected title is