fix: potential crash caused by dlopen different gtk libraries (#33650)

patches/chromium/make_gtk_getlibgtk_public.patch

@@ -0,0 +1,52 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: deepak1556 <hop2deep@gmail.com>
+Date: Thu, 7 Apr 2022 20:30:16 +0900
+Subject: Make gtk::GetLibGtk public
+
+Allows embedders to get a handle to the gtk library
+already loaded in the process.
+
+diff --git a/ui/gtk/gtk_compat.cc b/ui/gtk/gtk_compat.cc
+index 7104a0d5f4489c687f3cb9e63bc7cbef59d2fa62..f0b9ed834a3f7310da09377f0b2105cf635ffeb7 100644
+--- a/ui/gtk/gtk_compat.cc
++++ b/ui/gtk/gtk_compat.cc
+@@ -86,12 +86,6 @@ void* GetLibGtk4(bool check = true) {
+   return libgtk4;
+ }
+ 
+-void* GetLibGtk() {
+-  if (GtkCheckVersion(4))
+-    return GetLibGtk4();
+-  return GetLibGtk3();
+-}
+-
+ bool LoadGtk3() {
+   if (!GetLibGtk3(false))
+     return false;
+@@ -133,6 +127,12 @@ gfx::Insets InsetsFromGtkBorder(const GtkBorder& border) {
+ 
+ }  // namespace
+ 
++void* GetLibGtk() {
++  if (GtkCheckVersion(4))
++    return GetLibGtk4();
++  return GetLibGtk3();
++}
++
+ bool LoadGtk() {
+   static bool loaded = LoadGtkImpl();
+   return loaded;
+diff --git a/ui/gtk/gtk_compat.h b/ui/gtk/gtk_compat.h
+index 72981270fe26579211afcaf3c596a412f69f5fac..b5dbfde5b011d57d26960d245e0dc61cac9341e4 100644
+--- a/ui/gtk/gtk_compat.h
++++ b/ui/gtk/gtk_compat.h
+@@ -37,6 +37,9 @@ using SkColor = uint32_t;
+ 
+ namespace gtk {
+ 
++// Get handle to the currently loaded gtk library in the process.
++void* GetLibGtk();
++
+ // Loads libgtk and related libraries and returns true on success.
+ bool LoadGtk();
+