DevTools: allow styling the page number element when printing over the protocol.

Bug: none
Change-Id: I13e6afbd86a7c6bcdedbf0645183194b9de7cfb4
Reviewed-on: https://chromium-review.googlesource.com/809759
Commit-Queue: Pavel Feldman <pfeldman@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Jianzhou Feng <jzfeng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#523966}
  void OnScriptedPrint(const PrintHostMsg_ScriptedPrint_Params& scripted_params,
                       IPC::Message* reply_msg) {
    manager->OnScriptedPrint(scripted_params, reply_msg);
  }

  void OnScriptedPrint(const PrintHostMsg_ScriptedPrint_Params& scripted_params,
                       IPC::Message* reply_msg) {
    manager->OnScriptedPrint(scripted_params, reply_msg);
  }
