Replicate feature policy headers to remote frames

third_party/WebKit/Source/core/loader/FrameLoader.cpp

Index: third_party/WebKit/Source/core/loader/FrameLoader.cpp
diff --git a/third_party/WebKit/Source/core/loader/FrameLoader.cpp b/third_party/WebKit/Source/core/loader/FrameLoader.cpp
index 79980d3a15af98e7e09735ee6d2db57dea23669c..bdaed47c49a67d754d46d999c7baaad6fa53d008 100644
--- a/third_party/WebKit/Source/core/loader/FrameLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/FrameLoader.cpp
@@ -596,6 +596,11 @@ void FrameLoader::didBeginDocument() {
             "Error with Feature-Policy header: " + message));
       }
       m_frame->document()->setFeaturePolicy(std::move(featurePolicy));
+      if (client()) {
+        client()->didAddFeaturePolicyHeader(
+            m_documentLoader->response().httpHeaderField(
+                HTTPNames::Feature_Policy));
+      }
     }
   }