Introduce content-side Feature Policy object and maintain in parallel with renderer policy.

content/browser/frame_host/navigator_impl.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/frame_host/navigator_impl.h"
 
 #include <utility>
 
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 600 matching lines @@
   render_frame_host->frame_tree_node()->SetCurrentOrigin(
       params.origin, params.has_potentially_trustworthy_unique_origin);
 
   render_frame_host->frame_tree_node()->SetInsecureRequestPolicy(
       params.insecure_request_policy);
 
   // 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->frame_tree_node()->ResetContentSecurityPolicy();
-    render_frame_host->frame_tree_node()->ResetFeaturePolicy();
+    render_frame_host->frame_tree_node()->ResetFeaturePolicyHeader();
   }
 
   // When using --site-per-process, we notify the RFHM for all navigations,
   // not just main frame navigations.
   if (oopifs_possible) {
     FrameTreeNode* frame = render_frame_host->frame_tree_node();
     frame->render_manager()->DidNavigateFrame(
         render_frame_host, params.gesture == NavigationGestureUser);
   }
 
@@ skipping 49 matching lines @@
   // 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
   // (see https://crbug.com/560511).  Instead, the next cross-process navigation
   // or transfer should decide whether to swap as if the net error had not
   // occurred.
   // TODO(creis): Remove this block and always set the URL once transfers handle
   // network errors or PlzNavigate is enabled.  See https://crbug.com/588314.
   if (!params.url_is_unreachable)
     render_frame_host->set_last_successful_url(params.url);
 
+  // After setting the last committed origin, reset the feature policy in the
+  // RenderFrameHost to a blank policy based on the parent frame.
+  render_frame_host->ResetFeaturePolicy();
+
   // Send notification about committed provisional loads. This notification is
   // different from the NAV_ENTRY_COMMITTED notification which doesn't include
   // the actual URL navigated to and isn't sent for AUTO_SUBFRAME navigations.
   if (details.type != NAVIGATION_TYPE_NAV_IGNORE && delegate_) {
     DCHECK_EQ(!render_frame_host->GetParent(),
               did_navigate ? details.is_main_frame : false);
     ui::PageTransition transition_type = params.transition;
     // Whether or not a page transition was triggered by going backward or
     // forward in the history is only stored in the navigation controller's
     // entry list.
@@ skipping 620 matching lines @@
     if (navigation_handle)
       navigation_handle->update_entry_id_for_transfer(entry->GetUniqueID());
 
     controller_->SetPendingEntry(std::move(entry));
     if (delegate_)
       delegate_->NotifyChangedNavigationState(content::INVALIDATE_TYPE_URL);
   }
 }
 
 }  // namespace content