This is on top of the GCC 13 patches in our patchset.

https://bugs.gentoo.org/904342
--- a/src/3rdparty/chromium/third_party/blink/renderer/platform/graphics/dark_mode_image_classifier.cc
+++ b/src/3rdparty/chromium/third_party/blink/renderer/platform/graphics/dark_mode_image_classifier.cc
@@ -4,6 +4,7 @@
 
 #include "third_party/blink/renderer/platform/graphics/dark_mode_image_classifier.h"
 
+#include <cstdint>
 #include <set>
 
 #include "base/memory/singleton.h"
--- a/src/3rdparty/chromium/third_party/blink/renderer/platform/graphics/dark_mode_types.h
+++ b/src/3rdparty/chromium/third_party/blink/renderer/platform/graphics/dark_mode_types.h
@@ -5,6 +5,8 @@
 #ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_DARK_MODE_TYPES_H_
 #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_DARK_MODE_TYPES_H_
 
+#include <cstdint>
+
 namespace blink {
 
 enum class DarkModeResult : uint8_t {