Remove the deprecated use_nss and USE_NSS flags.

build/common.gypi

 # Copyright (c) 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 665 matching lines @@
         # A flag for BSD platforms
         ['OS=="freebsd" or OS=="openbsd"', {
           'os_bsd%': 1,
         }, {
           'os_bsd%': 0,
         }],
 
         # NSS usage.
         ['(OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris") and use_openssl==0', {
           'use_nss_certs%': 1,
-          # TODO(davidben): use_nss is deprecated and will be removed. See
-          # https://crbug.com/462040.
-          'use_nss%': 1,
         }, {
           'use_nss_certs%': 0,
-          # TODO(davidben): use_nss is deprecated and will be removed. See
-          # https://crbug.com/462040.
-          'use_nss%': 0,
         }],
 
         # When OpenSSL is used for SSL and crypto on Unix-like systems, use
         # OpenSSL's certificate definition.
         ['(OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris") and use_openssl==1', {
           'use_openssl_certs%': 1,
         }, {
           'use_openssl_certs%': 0,
         }],
 
@@ skipping 380 matching lines @@
     'mips_dsp_rev%': '<(mips_dsp_rev)',
     'host_arch%': '<(host_arch)',
     'toolkit_views%': '<(toolkit_views)',
     'ui_compositor_image_transport%': '<(ui_compositor_image_transport)',
     'use_aura%': '<(use_aura)',
     'use_ash%': '<(use_ash)',
     'use_cras%': '<(use_cras)',
     'use_libpci%': '<(use_libpci)',
     'use_openssl%': '<(use_openssl)',
     'use_openssl_certs%': '<(use_openssl_certs)',
-    'use_nss%': '<(use_nss)',
     'use_nss_certs%': '<(use_nss_certs)',
     'use_udev%': '<(use_udev)',
     'os_bsd%': '<(os_bsd)',
     'os_posix%': '<(os_posix)',
     'use_dbus%': '<(use_dbus)',
     'use_glib%': '<(use_glib)',
     'use_pango%': '<(use_pango)',
     'use_cairo%': '<(use_cairo)',
     'use_ozone%': '<(use_ozone)',
     'use_ozone_evdev%': '<(use_ozone_evdev)',
@@ skipping 1893 matching lines @@
       ['>(nacl_untrusted_build)==1', {
         'defines': [
           'USE_OPENSSL=1',
           'USE_OPENSSL_CERTS=1',
         ],
       }],
       ['<(use_glib)==1 and >(nacl_untrusted_build)==0', {
         'defines': ['USE_GLIB=1'],
       }],
       ['<(use_nss_certs)==1 and >(nacl_untrusted_build)==0', {
-        'defines': [
-          'USE_NSS_CERTS=1',
-          # TODO(davidben): USE_NSS is a deprecated alias for USE_NSS_CERTS and
-          # will be removed. See https://crbug.com/462040.
-          'USE_NSS=1',
-        ],
+        'defines': ['USE_NSS_CERTS=1'],
       }],
       ['<(chromeos)==1 and >(nacl_untrusted_build)==0', {
         'defines': ['OS_CHROMEOS=1'],
       }],
       ['enable_wexit_time_destructors==1 and OS!="win"', {
         # TODO: Enable on Windows too, http://crbug.com/404525
         'variables': { 'clang_warning_flags': ['-Wexit-time-destructors']},
       }],
       ['chromium_code==0', {
         'conditions': [
@@ skipping 3071 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }