try fix for constexpr issue with epel gcc

chromium-84.0.4147.89-el-constexpr.patch

@@ -0,0 +1,12 @@
+diff -up chromium-84.0.4147.89/base/check_op.h.el-constexpr chromium-84.0.4147.89/base/check_op.h
+--- chromium-84.0.4147.89/base/check_op.h.el-constexpr	2020-07-18 09:38:18.700433097 -0400
++++ chromium-84.0.4147.89/base/check_op.h	2020-07-18 09:38:26.698306359 -0400
+@@ -124,7 +124,7 @@ class CheckOpResult {
+   // A non-success result. expr_str is something like "foo != bar". v1_str and
+   // v2_str are the stringified run-time values of foo and bar. Takes ownership
+   // of v1_str and v2_str.
+-  BASE_EXPORT CheckOpResult(const char* expr_str, char* v1_str, char* v2_str);
++  BASE_EXPORT constexpr CheckOpResult(const char* expr_str, char* v1_str, char* v2_str);
+ 
+   // Returns true if the check succeeded.
+   constexpr explicit operator bool() const { return !message_; }

chromium.spec

@@ -295,6 +295,10 @@ Patch103:	chromium-84.0.4147.89-epel7-no-kcmp-h.patch
 # Use old cups (chromium's code workaround breaks on gcc)
 # Revert: https://github.com/chromium/chromium/commit/c3213f8779ddc427e89d982514185ed5e4c94e91
 Patch104:	chromium-84.0.4147.89-epel7-old-cups.patch
+# Old GCC throws:
+# ../../base/check_op.h: In function 'constexpr logging::CheckOpResult logging::CheckGTImpl(int, int, const char*)':
+# ../../base/check_op.h:180:3: error: call to non-'constexpr' function 'logging::CheckOpResult::CheckOpResult(const char*, char*, char*)'
+Patch105:	chromium-84.0.4147.89-el-constexpr.patch
 
 # Enable VAAPI support on Linux
 # NOTE: This patch will never land upstream
@@ -896,6 +900,10 @@ udev.
 %patch104 -p1 -b .el7cups
 %endif
 
+%if 0%{?rhel} == 7 || 0%{?rhel} == 8
+%patch105 -p1 -b .el-constexpr
+%endif
+
 # Feature specific patches
 %if %{use_vaapi}
 %patch202 -p1 -b .vaapi