Convert ClientSideDetectionHost to use the new navigation callbacks.

content/browser/frame_host/navigation_handle_impl.h

Index: content/browser/frame_host/navigation_handle_impl.h
diff --git a/content/browser/frame_host/navigation_handle_impl.h b/content/browser/frame_host/navigation_handle_impl.h
index c092ac80c60537cfe5427b6ff945b488afd2e40f..74b629e6f67bcbf531b4b8024fefac27089dbe63 100644
--- a/content/browser/frame_host/navigation_handle_impl.h
+++ b/content/browser/frame_host/navigation_handle_impl.h
@@ -314,6 +314,11 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
     searchable_form_encoding_ = encoding;
   }
 
+  void set_response_headers_for_testing(
+      scoped_refptr<net::HttpResponseHeaders> response_headers) {
+    response_headers_ = response_headers;
+  }
+
  private:
   friend class NavigationHandleImplTest;