Store the last committed origin in RenderFrameHostImpl.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index f71cdd03bcf710d246d6ade462d841996e67cfb7..2d63e9f4cb18b82db7c2d45b201121990c0e2f1c 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -475,10 +475,8 @@ const GURL& RenderFrameHostImpl::GetLastCommittedURL() {
   return last_committed_url();
 }
 
-url::Origin RenderFrameHostImpl::GetLastCommittedOrigin() {
-  // Origin is stored per-FTN, so it's incorrect to call for a non-current RFH.
-  CHECK(this == frame_tree_node_->current_frame_host());
-  return frame_tree_node_->current_origin();
+const url::Origin& RenderFrameHostImpl::GetLastCommittedOrigin() {
+  return last_committed_origin_;
 }
 
 gfx::NativeView RenderFrameHostImpl::GetNativeView() {