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

content/browser/frame_host/navigator_impl.cc

Index: content/browser/frame_host/navigator_impl.cc
diff --git a/content/browser/frame_host/navigator_impl.cc b/content/browser/frame_host/navigator_impl.cc
index ad1a19a5eb33de3be38b9eb3335cf595e60c6f51..87f6590bb83c544ddb401622c92b530c1db02557 100644
--- a/content/browser/frame_host/navigator_impl.cc
+++ b/content/browser/frame_host/navigator_impl.cc
@@ -231,8 +231,7 @@
       validated_url, validated_redirect_chain,
       render_frame_host->frame_tree_node(), is_renderer_initiated,
       false,  // is_same_page
-      navigation_start, pending_nav_entry_id, started_from_context_menu,
-      CSPDisposition::CHECK));  // should_check_main_world_csp
+      navigation_start, pending_nav_entry_id, started_from_context_menu));
 }
 
 void NavigatorImpl::DidFailProvisionalLoadWithError(
@@ -613,8 +612,7 @@
   // Navigating to a new location means a new, fresh set of http headers and/or
   // <meta> elements - we need to reset CSP and Feature Policy.
   if (!is_navigation_within_page) {
-    render_frame_host->ResetContentSecurityPolicies();
-    render_frame_host->frame_tree_node()->ResetCspHeaders();
+    render_frame_host->frame_tree_node()->ResetContentSecurityPolicy();
     render_frame_host->frame_tree_node()->ResetFeaturePolicyHeader();
   }
 
@@ -673,7 +671,7 @@
   // stay correct even if the render_frame_host later becomes pending deletion.
   // The URL is set regardless of whether it's for a net error or not.
   render_frame_host->frame_tree_node()->SetCurrentURL(params.url);
-  render_frame_host->SetLastCommittedOrigin(params.origin);
+  render_frame_host->set_last_committed_origin(params.origin);
 
   // Separately, update the frame's last successful URL except for net error
   // pages, since those do not end up in the correct process after transfers