diff -up chromium-77.0.3865.75/base/numerics/safe_math_shared_impl.h.nogccoptmath chromium-77.0.3865.75/base/numerics/safe_math_shared_impl.h
--- chromium-77.0.3865.75/base/numerics/safe_math_shared_impl.h.nogccoptmath	2019-09-12 09:55:13.041038765 +0200
+++ chromium-77.0.3865.75/base/numerics/safe_math_shared_impl.h	2019-09-12 10:11:14.088101504 +0200
@@ -24,8 +24,7 @@
 #elif !defined(__native_client__) &&                         \
       ((defined(__clang__) &&                                \
         ((__clang_major__ > 3) ||                            \
-         (__clang_major__ == 3 && __clang_minor__ >= 4))) || \
-       (defined(__GNUC__) && __GNUC__ >= 5))
+         (__clang_major__ == 3 && __clang_minor__ >= 4)))
 #include "base/numerics/safe_math_clang_gcc_impl.h"
 #define BASE_HAS_OPTIMIZED_SAFE_MATH (1)
 #else