Make Document::isSecureContext() work for OOPIFs

content/browser/frame_host/render_frame_host_manager.h

Index: content/browser/frame_host/render_frame_host_manager.h
diff --git a/content/browser/frame_host/render_frame_host_manager.h b/content/browser/frame_host/render_frame_host_manager.h
index 5eba090cdb6ca43a11be38010b238f700de1281f..c39b3d2e6288556819cb796d3cb60f428645c86c 100644
--- a/content/browser/frame_host/render_frame_host_manager.h
+++ b/content/browser/frame_host/render_frame_host_manager.h
@@ -442,6 +442,11 @@ class CONTENT_EXPORT RenderFrameHostManager
   // frame proxies when the frame changes its setting.
   void OnEnforceStrictMixedContentChecking(bool should_enforce);
 
+  // Sends an updated flag to all frame proxies indicating whether the origin is
+  // unique and potentially trustworthy.
+  void OnSetUniqueOriginPotentiallyTrustworthy(
+      bool is_unique_origin_potentially_trustworthy);
+
   // Send updated origin to all frame proxies when the frame navigates to a new
   // origin.
   void OnDidUpdateOrigin(const url::Origin& origin);