Replicate feature policy headers to remote frames

content/common/frame_messages.h

Index: content/common/frame_messages.h
diff --git a/content/common/frame_messages.h b/content/common/frame_messages.h
index 20f601c8302807503e1aec9d21e074adc9b394b6..e6680a033bd1ec5de435914c50f28becccd318ad 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -402,6 +402,7 @@ IPC_STRUCT_TRAITS_BEGIN(content::FrameReplicationState)
   IPC_STRUCT_TRAITS_MEMBER(sandbox_flags)
   IPC_STRUCT_TRAITS_MEMBER(name)
   IPC_STRUCT_TRAITS_MEMBER(unique_name)
+  IPC_STRUCT_TRAITS_MEMBER(feature_policy_header)
   IPC_STRUCT_TRAITS_MEMBER(accumulated_csp_headers)
   IPC_STRUCT_TRAITS_MEMBER(scope)
   IPC_STRUCT_TRAITS_MEMBER(insecure_request_policy)
@@ -998,6 +999,10 @@ IPC_MESSAGE_ROUTED2(FrameHostMsg_DidChangeName,
                     std::string /* name */,
                     std::string /* unique_name */)
 
+// Notifies the browser process that a non-empty Feature-Policy HTTP header was
+// delivered with the document being loaded into the frame.
+IPC_MESSAGE_ROUTED1(FrameHostMsg_DidSetFeaturePolicyHeader, std::string)
+
 // Notifies the browser process about a new Content Security Policy that needs
 // to be applies to the frame.  This message is sent when a frame commits
 // navigation to a new location (reporting accumulated policies from HTTP