Introduce content-side Feature Policy object and maintain in parallel with renderer policy.

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 621c412528691699e699b8f9765957598bcb6924..8e4b082ea56b58982415f65fd5b196a2b05b9acb 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -3362,6 +3362,15 @@ void RenderFrameHostImpl::DeleteWebBluetoothService(
   web_bluetooth_services_.erase(it);
 }
 
+void RenderFrameHostImpl::SetFeaturePolicy(
+    std::unique_ptr<FeaturePolicy> feature_policy) {
+  feature_policy_ = std::move(feature_policy);
+}
+
+FeaturePolicy* RenderFrameHostImpl::GetFeaturePolicy() {
+  return feature_policy_.get();
+}
+
 void RenderFrameHostImpl::Create(
     const service_manager::Identity& remote_identity,
     media::mojom::InterfaceFactoryRequest request) {