Add helper class for tests using browser process hit testing

content/browser/frame_host/render_widget_host_view_child_frame.h

Index: content/browser/frame_host/render_widget_host_view_child_frame.h
diff --git a/content/browser/frame_host/render_widget_host_view_child_frame.h b/content/browser/frame_host/render_widget_host_view_child_frame.h
index bfff4b10c9a5e7998a87ea045889b45e79e1caa7..bb654aa42684d377cd948e4218baee489e9b46bc 100644
--- a/content/browser/frame_host/render_widget_host_view_child_frame.h
+++ b/content/browser/frame_host/render_widget_host_view_child_frame.h
@@ -178,6 +178,12 @@ class CONTENT_EXPORT RenderWidgetHostViewChildFrame
   // to Bind() to it.
   void SurfaceDrawn(uint32_t output_surface_id, cc::SurfaceDrawStatus drawn);
 
+  // Exposed for tests.
+  cc::SurfaceId SurfaceIdForTesting() const { return surface_id_; };
+  CrossProcessFrameConnector* FrameConnectorForTesting() const {
+    return frame_connector_;
+  }
+
  protected:
   friend class RenderWidgetHostView;
   friend class RenderWidgetHostViewChildFrameTest;