Linux Aura: Use Separate profile key specifically for theme usage

chrome/browser/ui/views/chrome_browser_main_extra_parts_views_linux.cc

Index: chrome/browser/ui/views/chrome_browser_main_extra_parts_views_linux.cc
diff --git a/chrome/browser/ui/views/chrome_browser_main_extra_parts_views_linux.cc b/chrome/browser/ui/views/chrome_browser_main_extra_parts_views_linux.cc
index 09cd6092ff6c7c5f1899c45317573855ff15162b..74adde50366bb98cd11a84d9f11c580588947c44 100644
--- a/chrome/browser/ui/views/chrome_browser_main_extra_parts_views_linux.cc
+++ b/chrome/browser/ui/views/chrome_browser_main_extra_parts_views_linux.cc
@@ -12,6 +12,7 @@
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/libgtkui/gtk_ui.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
+#include "chrome/browser/ui/views/theme_profile_key.h"
 #include "chrome/common/pref_names.h"
 #include "components/prefs/pref_service.h"
 #include "ui/aura/env.h"
@@ -33,8 +34,7 @@ ui::NativeTheme* GetNativeThemeForWindow(aura::Window* window) {
   if (!window)
     return nullptr;
 
-  Profile* profile = reinterpret_cast<Profile*>(
-      window->GetNativeWindowProperty(Profile::kProfileKey));
+  Profile* profile = GetThemeProfileForWindow(window);
 
   // If using the system (GTK) theme, don't use an Aura NativeTheme at all.
   // NB: ThemeService::UsingSystemTheme() might lag behind this pref. See