Expose RenderFrameHost::GetLastCommittedOrigin().

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 9a8810b3aa9a45c2ec8424f30fbbff6800fe5421..4eeda768c6c22ee0542e6c43d466e9f8563697f2 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -311,6 +311,15 @@ GURL RenderFrameHostImpl::GetLastCommittedURL() {
   return frame_tree_node_->current_url();
 }
 
+url::Origin RenderFrameHostImpl::GetLastCommittedOrigin() {
+  // Origin is stored per-FTN, so it's incorrect to call for a non-current RFH.
+  if (this != frame_tree_node_->current_frame_host()) {
+    NOTREACHED() << "Origin information is tracked only for the current host.";
+    return url::Origin();
+  }
+  return frame_tree_node_->current_replication_state().origin;

[alexmos, 2015/11/24 00:05:49]

We can now just do frame_tree_node_->current_origin().  Same for tests (Charlie
cleaned that up on Friday).

[ncarter (slow), 2015/11/24 00:35:33]

Will do.

+}
+
 gfx::NativeView RenderFrameHostImpl::GetNativeView() {
   RenderWidgetHostView* view = render_view_host_->GetWidget()->GetView();
   if (!view)