Add helper class for tests using browser process hit testing

content/browser/frame_host/cross_process_frame_connector.h

Index: content/browser/frame_host/cross_process_frame_connector.h
diff --git a/content/browser/frame_host/cross_process_frame_connector.h b/content/browser/frame_host/cross_process_frame_connector.h
index 9958c9e7720c6a551b88cf86681ca1bb458aa7e2..f42466ff956fb69678738cc8555c67e1ae916268 100644
--- a/content/browser/frame_host/cross_process_frame_connector.h
+++ b/content/browser/frame_host/cross_process_frame_connector.h
@@ -100,6 +100,11 @@ class CONTENT_EXPORT CrossProcessFrameConnector {
   // page) has focus.
   bool HasFocus();
 
+  // Exposed for tests.
+  RenderWidgetHostViewBase* GetRootRenderWidgetHostViewForTesting() {
+    return GetRootRenderWidgetHostView();
+  }
+
  private:
   // Handlers for messages received from the parent frame.
   void OnForwardInputEvent(const blink::WebInputEvent* event);