Work on Mac GN build

tools/gn/secondary/third_party/nss/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/linux/pkg_config.gni")
 
 if (is_linux) {
   # This is a dependency on NSS with no libssl. On Linux we use a built-in SSL
   # library but the system NSS libraries. Non-Linux platforms using NSS use the
   # hermetic one in //third_party/nss.
@@ skipping 195 matching lines @@
       "nspr/pr/src/threads/prmon.c",
       "nspr/pr/src/threads/prrwlock.c",
       "nspr/pr/src/threads/prsem.c",
       "nspr/pr/src/threads/prtpd.c",
     ]
 
     direct_dependent_configs = [ ":nspr_config" ]
 
     configs -= [
       "//build/config/compiler:chromium_code",
-      "//build/config/win:unicode",  # Requires 8-bit mode.
-      "//build/config/win:lean_and_mean",  # Won"t compile with lean and mean.
     ]
+    if (is_win) {
+      configs -= [
+        "//build/config/win:unicode",  # Requires 8-bit mode.
+        "//build/config/win:lean_and_mean",  # Won"t compile with lean and mean.
+      ]
+    }
     configs += [ "//build/config/compiler:no_chromium_code" ]
 
+    cflags = []
     defines = [
       "_NSPR_BUILD",
       "FORCE_PR_LOG",
     ]
 
     include_dirs = [
       "nspr/pr/include/private",
     ]
 
     if (is_win) {
@@ skipping 192 matching lines @@
       "nss/lib/ckfw/object.c",
       "nss/lib/ckfw/session.c",
       "nss/lib/ckfw/sessobj.c",
       "nss/lib/ckfw/slot.c",
       "nss/lib/ckfw/token.c",
       "nss/lib/ckfw/wrap.c",
     ]
 
     configs -= [
       "//build/config/compiler:chromium_code"
-      "//build/config/win:unicode",  # Requires 8-bit mode.
     ]
+
+    if (is_win) {
+      configs -= [
+        "//build/config/win:unicode",  # Requires 8-bit mode.
+      ]
+    }
     configs += [ "//build/config/compiler:no_chromium_code" ]
 
     include_dirs = [ "nss/lib/ckfw" ]
     direct_dependent_configs = [ ":nssckbi_config" ]
 
     deps = [
       ":nss_static",
     ]
     forward_dependent_configs_from = deps
   }
@@ skipping 376 matching lines @@
       "nss/lib/freebl/mpi/primes.c",
       # unix_rand.c and win_rand.c are included by sysrand.c.
       "nss/lib/freebl/unix_rand.c",
       "nss/lib/freebl/win_rand.c",
       # debug_module.c is included by pk11load.c.
       "nss/lib/pk11wrap/debug_module.c",
     ]
 
     configs -= [
       "//build/config/compiler:chromium_code"
-      "//build/config/win:unicode",  # Requires 8-bit mode.
     ]
+    if (is_win) {
+      configs -= [
+        "//build/config/win:unicode",  # Requires 8-bit mode.
+      ]
+    }
     configs += [ "//build/config/compiler:no_chromium_code" ]
     direct_dependent_configs = [ ":nss_static_config" ]
 
     cflags = []
 
     # Only need the defines and includes not in nss_static_config.
     defines = [
       "MP_API_COMPATIBLE",
       "NSS_DISABLE_DBM",
       "RIJNDAEL_INCLUDE_TABLES",
@@ skipping 297 matching lines @@
 
     deps = [
       ":nspr",
       "//third_party/sqlite",
     ]
 
     forward_dependent_configs_from = [ ":nspr" ]
   }
 }  # Windows/Mac/iOS.