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 cd2e4ee3c26a4033952e5e29b04872a02e0af1a4..90449fc99fc993f0cea3f4b00cfa78c815da61a1 100644
--- a/content/common/frame_messages.h
+++ b/content/common/frame_messages.h
@@ -401,6 +401,7 @@ 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)
@@ -1001,6 +1002,8 @@ IPC_MESSAGE_ROUTED2(FrameHostMsg_DidChangeName,
                     std::string /* name */,
                     std::string /* unique_name */)
 
+IPC_MESSAGE_ROUTED1(FrameHostMsg_DidSetFeaturePolicyHeader, std::string)

[alexmos, 2016/11/17 21:45:59]

Please add a comment for what this is for, and mention it's only sent when the
header is present/non-empty.

[iclelland, 2016/11/18 16:12:37]

Done.

+
 // 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