Revert of PlzNavigate: Enforce 'frame-src' CSP on the browser.

content/public/browser/navigation_handle.cc

Index: content/public/browser/navigation_handle.cc
diff --git a/content/public/browser/navigation_handle.cc b/content/public/browser/navigation_handle.cc
index 73f59738cd5b84ee525f9a543af0c24ac5d2ed2e..bcdbdb97b199bb949da118d5bfcd64b7087178ad 100644
--- a/content/public/browser/navigation_handle.cc
+++ b/content/public/browser/navigation_handle.cc
@@ -33,10 +33,10 @@
   std::unique_ptr<NavigationHandleImpl> handle_impl =
       NavigationHandleImpl::Create(
           url, std::vector<GURL>(), rfhi->frame_tree_node(),
-          true,  // is_renderer_initiated
-          is_same_page, base::TimeTicks::Now(), 0,
-          false,                   // started_from_context_menu
-          CSPDisposition::CHECK);  // should_check_main_world_csp
+          true,   // is_renderer_initiated
+          is_same_page,
+          base::TimeTicks::Now(), 0,
+          false);  // started_from_context_menu
   handle_impl->set_render_frame_host(rfhi);
   if (error != net::OK)
     handle_impl->set_net_error_code(error);