Renaming system.gyp:ssl to system.gyp:nss and removing unused BUILD.gn

chrome/chrome_tests_unit.gypi

 # Copyright 2012 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.
 {
   'variables': {
     'chrome_unit_tests_sources': [
       # histograms.xml is analyzed by AboutFlagsHistogramTest, so this
       # dependency is needed to make commit bots run unit_tests on
       # histograms.xml changes.
       '../tools/metrics/histograms/histograms.xml',
@@ skipping 2019 matching lines @@
           ],
         }],
         ['safe_browsing==1', {
           'sources': [
             'browser/extensions/fake_safe_browsing_database_manager.cc',
             'browser/extensions/fake_safe_browsing_database_manager.h',
           ],
         }],
         ['OS=="linux"', {
           'dependencies': [
-            '../build/linux/system.gyp:ssl',
+            '../build/linux/system.gyp:nss',
           ],
         }],
         ['enable_print_preview==1', {
           'dependencies': [
             'service',
           ],
         }],
         ['enable_extensions==1', {
           'dependencies': [
             '../components/components.gyp:drive_test_support',
@@ skipping 484 matching lines @@
           ],
         }],
         ['use_x11==1', {
           'dependencies': [
             '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
             '../ui/events/devices/events_devices.gyp:events_devices',
           ],
         }],
         ['OS=="linux"', {
           'dependencies': [
-            '../build/linux/system.gyp:ssl',
+            '../build/linux/system.gyp:nss',
           ],
         }],
         # Only add this test for 64 bit builds because otherwise we need the 32
         # bit library on 64 bit systems when running this test.
         ['use_gnome_keyring == 1 and target_arch=="x64"', {
           'sources': [
             'browser/password_manager/native_backend_gnome_x_unittest.cc',
           ],
           # We use a few library functions directly, so link directly.
           'dependencies': [
@@ skipping 450 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }