Win/GN: Make no_exception config explicit.

build/config/BUILDCONFIG.gn

Index: build/config/BUILDCONFIG.gn
diff --git a/build/config/BUILDCONFIG.gn b/build/config/BUILDCONFIG.gn
index 6390ae91725bc4add79571b2872ba63bf7d5b05b..348e6dd5f9b312c9cf6ee739a88ec5085f7df811 100644
--- a/build/config/BUILDCONFIG.gn
+++ b/build/config/BUILDCONFIG.gn
@@ -474,6 +474,7 @@ default_compiler_configs = [
   "//build/config/compiler:default_include_dirs",
   "//build/config/compiler:default_optimization",
   "//build/config/compiler:default_symbols",
+  "//build/config/compiler:no_exceptions",
   "//build/config/compiler:no_rtti",
   "//build/config/compiler:runtime_library",
   "//build/config/sanitizers:default_sanitizer_flags",
@@ -492,10 +493,7 @@ if (current_os == "winrt_81" || current_os == "winrt_81_phone" ||
   default_compiler_configs += [ "//build/config/win:target_winrt" ]
 }
 if (is_posix) {
-  default_compiler_configs += [
-    "//build/config/gcc:no_exceptions",
-    "//build/config/gcc:symbol_visibility_hidden",
-  ]
+  default_compiler_configs += [ "//build/config/gcc:symbol_visibility_hidden" ]
 }
 
 if (is_android) {