Disable NaCl Glibc tests on Mac

The nacl-gcc toolchain no longer runs on recent version of MacOS.
Coverage of the glibc toolchain's use of the Pepper ABIs will continue
on Linux/Win.

Change-Id: Id60229cfde0fca368a28f708994b26c479326606
Bug: 1013169
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1888723Reviewed-by: Bill Budge <bbudge@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#711087}

chrome/test/data/nacl/BUILD.gn

@@ -61,7 +61,9 @@ group("nacl") {
   if (target_cpu != "arm") {
     data_deps += [ ":partly_invalid($newlib)" ]
   }
-  if (target_cpu != "mipsel") {
+  if (target_cpu != "mipsel" && !is_mac) {
+    # GlibC tools are not available for MIPS
+    # The GlibC toolchain is based on gcc, which no longer runs on mac
     glibc = "//build/toolchain/nacl:glibc_${target_cpu}"
     data_deps += [
       ":exit_status_test($glibc)",
@@ -612,6 +614,7 @@ if (is_linux && is_clang) {
     # Do not use any sanitizers or coverage tools, which require a few symbols.
     configs -= [ "//build/config/sanitizers:default_sanitizer_flags" ]
     configs -= [ "//build/config/coverage:default_coverage" ]
+
     # Disable default_init_stack_vars because it inserts memset() calls, but
     # memset() is not available in this libc-free context.
     configs -= [ "//build/config/compiler:default_init_stack_vars" ]

chrome/test/nacl/nacl_browsertest_util.h

@@ -177,7 +177,8 @@ class NaClBrowserTestGLibcExtension : public NaClBrowserTestGLibc {
 #endif
 
 // NaCl glibc toolchain is not available on MIPS
-#if defined(ARCH_CPU_MIPS_FAMILY)
+// It also no longer runs on recent versions of MacOS
+#if defined(ARCH_CPU_MIPS_FAMILY) || defined(OS_MACOSX)
 #  define MAYBE_GLIBC(test_name) DISABLED_##test_name
 #else
 #  define MAYBE_GLIBC(test_name) test_name

ppapi/BUILD.gn

@@ -486,7 +486,7 @@ if (enable_nacl) {
       ":ppapi_nacl_tests(//build/toolchain/nacl:newlib_pnacl)",
     ]
 
-    if (target_cpu != "mipsel") {
+    if (target_cpu != "mipsel" && !is_mac) {
       data_deps +=
           [ ":ppapi_nacl_tests(//build/toolchain/nacl:glibc_${target_cpu})" ]
     }