Support building BoringSSL with NSS certificates.

chrome/chrome_utility.gypi

Index: chrome/chrome_utility.gypi
diff --git a/chrome/chrome_utility.gypi b/chrome/chrome_utility.gypi
index eb9e7c6517b0445b5108dea7bf7f3fdc642a7ebf..c82e937513c5eb1e3dbd11bbc6824f998e7003ee 100644
--- a/chrome/chrome_utility.gypi
+++ b/chrome/chrome_utility.gypi
@@ -120,12 +120,12 @@
         '<@(chrome_utility_sources)',
       ],
       'conditions': [
-        ['OS!="win" and OS!="mac" and use_openssl==1', {
-          'sources!': [
-            'utility/importer/nss_decryptor.cc',
-          ]
+        ['OS!="android"', {
+          'sources': [
+            '<@(chrome_utility_importer_sources)',
+          ],
         }],
-        ['OS!="win" and OS!="mac" and use_openssl==0', {
+        ['use_nss==1', {
           'dependencies': [
             '../crypto/crypto.gyp:crypto',
           ],
@@ -134,11 +134,6 @@
             'utility/importer/nss_decryptor_system_nss.h',
           ],
         }],
-        ['OS!="android"', {
-          'sources': [
-            '<@(chrome_utility_importer_sources)',
-          ],
-        }],
         ['enable_extensions==1', {
           'dependencies': [
             '../extensions/extensions.gyp:extensions_utility',