Make Document::isSecureContext() work for OOPIFs

content/browser/frame_host/render_frame_host_manager.cc

Index: content/browser/frame_host/render_frame_host_manager.cc
diff --git a/content/browser/frame_host/render_frame_host_manager.cc b/content/browser/frame_host/render_frame_host_manager.cc
index d99018945366b5feda09daea5fd64f3ce9334497..11512b67e792960024d6b0d41e6d559b0a317c8c 100644
--- a/content/browser/frame_host/render_frame_host_manager.cc
+++ b/content/browser/frame_host/render_frame_host_manager.cc
@@ -998,6 +998,17 @@ void RenderFrameHostManager::OnEnforceStrictMixedContentChecking(
   }
 }
 
+void RenderFrameHostManager::OnSetUniqueOriginPotentiallyTrustworthy(
+    bool is_unique_origin_potentially_trustworthy) {
+  if (!SiteIsolationPolicy::AreCrossProcessFramesPossible())
+    return;
+
+  for (const auto& pair : proxy_hosts_) {
+    pair.second->Send(new FrameMsg_DidSetUniqueOriginPotentiallyTrustworthy(
+        pair.second->GetRoutingID(), is_unique_origin_potentially_trustworthy));
+  }
+}
+
 void RenderFrameHostManager::OnDidUpdateOrigin(const url::Origin& origin) {
   if (!SiteIsolationPolicy::IsSwappedOutStateForbidden())
     return;