Replace c/b/nss_context by a KeyedService.

chromeos/chromeos.gyp

Index: chromeos/chromeos.gyp
diff --git a/chromeos/chromeos.gyp b/chromeos/chromeos.gyp
index 2ff6c94e8e7286b7d2e26487980aa858ae167c67..08b5c807c5355f477f65443a14cd24353f264795 100644
--- a/chromeos/chromeos.gyp
+++ b/chromeos/chromeos.gyp
@@ -19,6 +19,7 @@
         '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
         '../build/linux/system.gyp:dbus',
         '../build/linux/system.gyp:ssl',
+        '../components/components.gyp:cert_database',
         '../components/components.gyp:cloud_policy_proto',
         '../components/components.gyp:onc_component',
         '../crypto/crypto.gyp:crypto',
@@ -301,6 +302,8 @@
         'network/certificate_pattern.h',
         'network/client_cert_resolver.cc',
         'network/client_cert_resolver.h',
+        'network/client_cert_store_chromeos.cc',
+        'network/client_cert_store_chromeos.h',
         'network/client_cert_util.cc',
         'network/client_cert_util.h',
         'network/device_state.cc',
@@ -575,6 +578,7 @@
         'login/auth/key_unittest.cc',
         'login/login_state_unittest.cc',
         'network/client_cert_resolver_unittest.cc',
+        'network/client_cert_store_chromeos_unittest.cc',
         'network/geolocation_handler_unittest.cc',
         'network/host_resolver_impl_chromeos_unittest.cc',
         'network/managed_network_configuration_handler_unittest.cc',