Make Document::isSecureContext() work for OOPIFs

content/browser/frame_host/frame_tree_node.cc

Index: content/browser/frame_host/frame_tree_node.cc
diff --git a/content/browser/frame_host/frame_tree_node.cc b/content/browser/frame_host/frame_tree_node.cc
index 7ef7ca46df61e4cd3d93f61cad43c963a2c4f462..509da71c31ad57797f4ebf7ab3b47427c577c508 100644
--- a/content/browser/frame_host/frame_tree_node.cc
+++ b/content/browser/frame_host/frame_tree_node.cc
@@ -98,7 +98,8 @@ FrameTreeNode::FrameTreeNode(
           name,
           unique_name,
           blink::WebSandboxFlags::None,
-          false /* should enforce strict mixed content checking */),
+          false /* should enforce strict mixed content checking */,
+          false /* is a potentially trustworthy unique origin */),
       pending_sandbox_flags_(blink::WebSandboxFlags::None),
       frame_owner_properties_(frame_owner_properties),
       loading_progress_(kLoadingProgressNotStarted) {
@@ -241,6 +242,18 @@ void FrameTreeNode::SetEnforceStrictMixedContentChecking(bool should_enforce) {
       should_enforce;
 }
 
+void FrameTreeNode::SetUniqueOriginPotentiallyTrustworthy(
+    bool is_unique_origin_potentially_trustworthy) {
+  if (replication_state_.is_potentially_trustworthy_unique_origin ==
+      is_unique_origin_potentially_trustworthy) {
+    return;
+  }
+  render_manager_.OnSetUniqueOriginPotentiallyTrustworthy(
+      is_unique_origin_potentially_trustworthy);
+  replication_state_.is_potentially_trustworthy_unique_origin =
+      is_unique_origin_potentially_trustworthy;
+}
+
 void FrameTreeNode::SetPendingSandboxFlags(
     blink::WebSandboxFlags sandbox_flags) {
   pending_sandbox_flags_ = sandbox_flags;