From 6f44cfcb65e4b596a85ca08a4ffb7202e20682a6 Mon Sep 17 00:00:00 2001
From: Marshall Greenblatt <magreenblatt@gmail.com>
Date: Fri, 18 Oct 2024 11:51:06 -0400
Subject: [PATCH] linux: Fix callbacks to CefPrintHandler (fixes #3729)

Out-of-process printing must also be disabled by passing
`--disable-features=EnableOopPrintDrivers`.
---
 .../browser/chrome/chrome_browser_main_extra_parts_cef.cc | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libcef/browser/chrome/chrome_browser_main_extra_parts_cef.cc b/libcef/browser/chrome/chrome_browser_main_extra_parts_cef.cc
index f04ee109c..b85ef8a3a 100644
--- a/libcef/browser/chrome/chrome_browser_main_extra_parts_cef.cc
+++ b/libcef/browser/chrome/chrome_browser_main_extra_parts_cef.cc
@@ -17,6 +17,7 @@
 
 #if BUILDFLAG(IS_LINUX)
 #include "base/linux_util.h"
+#include "cef/libcef/browser/printing/print_dialog_linux.h"
 #endif
 
 #if BUILDFLAG(IS_WIN)
@@ -83,4 +84,11 @@ void ChromeBrowserMainExtraPartsCef::ToolkitInitialized() {
   // Override the default Chrome client.
   SetConstrainedWindowViewsClient(CreateAlloyConstrainedWindowViewsClient(
       CreateChromeConstrainedWindowViewsClient()));
+
+#if BUILDFLAG(IS_LINUX)
+  auto printing_delegate = new CefPrintingContextLinuxDelegate();
+  auto default_delegate =
+      ui::PrintingContextLinuxDelegate::SetInstance(printing_delegate);
+  printing_delegate->SetDefaultDelegate(default_delegate);
+#endif  // BUILDFLAG(IS_LINUX)
 }