PlzNavigate: implement CommitNavigation on the browser side

content/test/test_render_frame_host.cc

Index: content/test/test_render_frame_host.cc
diff --git a/content/test/test_render_frame_host.cc b/content/test/test_render_frame_host.cc
index eabbbda41167f6f4a3ca65e322085aaf5c72acd0..2e79d8f62c0661a22a3089cacef2e8a2549c329f 100644
--- a/content/test/test_render_frame_host.cc
+++ b/content/test/test_render_frame_host.cc
@@ -174,8 +174,6 @@ void TestRenderFrameHost::SendBeginNavigationWithURL(const GURL& url) {
   params.load_flags = net::LOAD_NORMAL;
   params.has_user_gesture = false;
   params.transition_type = PAGE_TRANSITION_LINK;
-  params.should_replace_current_entry = false;
-  params.allow_download = true;
   OnBeginNavigation(params);
 }