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	2019-09-13 14:17:22.726738088 +0200
+++ chromium-77.0.3865.75/base/numerics/safe_math_shared_impl.h	2019-09-13 14:31:37.686898493 +0200
@@ -23,9 +23,8 @@
 // Where available use builtin math overflow support on Clang and GCC.
 #elif !defined(__native_client__) &&                         \
       ((defined(__clang__) &&                                \
-        ((__clang_major__ > 3) ||                            \
-         (__clang_major__ == 3 && __clang_minor__ >= 4))) || \
-       (defined(__GNUC__) && __GNUC__ >= 5))
+        (__clang_major__ > 3) ||                            \
+        (__clang_major__ == 3 && __clang_minor__ >= 4)))
 #include "base/numerics/safe_math_clang_gcc_impl.h"
 #define BASE_HAS_OPTIMIZED_SAFE_MATH (1)
 #else