diff -up chromium-78.0.3904.70/base/allocator/debugallocation_shim.cc.invalid-pragma chromium-78.0.3904.70/base/allocator/debugallocation_shim.cc
--- chromium-78.0.3904.70/base/allocator/debugallocation_shim.cc.invalid-pragma	2019-10-23 10:00:41.361932768 -0400
+++ chromium-78.0.3904.70/base/allocator/debugallocation_shim.cc	2019-10-23 10:02:09.778100948 -0400
@@ -7,9 +7,10 @@
 // AFDO can mess with them. Better not to use AFDO there.  This is a
 // temporary hack. We will add a mechanism in the build system to
 // avoid using -fauto-profile for tcmalloc files.
-#if !defined(__clang__) && (defined(OS_CHROMEOS) || __GNUC__ > 5)
+#if !defined(__clang__) && \
+    (defined(OS_CHROMEOS) || (__GNUC__ > 5 && __GNUC__ < 7))
 // Note that this option only seems to be available in the chromeos GCC 4.9
-// toolchain, and stock GCC 5 and up.
+// toolchain, and stock GCC 5 upto 7.
 #pragma GCC optimize ("no-auto-profile")
 #endif