Add an instrumented library stub.

third_party/instrumented_libraries/instrumented_libraries.gyp

 # Copyright 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.
 
 {
   'variables': {
     'verbose_libraries_build%': 0,
     'instrumented_libraries_jobs%': 1,
     'instrumented_libraries_cc%': '<!(cd <(DEPTH) && pwd -P)/<(make_clang_dir)/bin/clang',
     'instrumented_libraries_cxx%': '<!(cd <(DEPTH) && pwd -P)/<(make_clang_dir)/bin/clang++',
@@ skipping 181 matching lines @@
         '<(_sanitizer_type)-libdbusmenu-glib4',
         '<(_sanitizer_type)-libgconf-2-4',
         '<(_sanitizer_type)-libappindicator1',
         '<(_sanitizer_type)-libdbusmenu',
         '<(_sanitizer_type)-atk1.0',
         '<(_sanitizer_type)-libunity9',
         '<(_sanitizer_type)-dee',
         '<(_sanitizer_type)-libpixman-1-0',
         '<(_sanitizer_type)-brltty',
         '<(_sanitizer_type)-libva1',
+        '<(_sanitizer_type)-libcredentialkit_pkcs11-stub',
       ],
       'conditions': [
         ['"<(_ubuntu_release)"=="precise"', {
           'dependencies': [
             '<(_sanitizer_type)-libtasn1-3',
           ],
         }, {
           'dependencies': [
             # Trusty and above.
             '<(_sanitizer_type)-libtasn1-6',
@@ skipping 638 matching lines @@
       'package_name': 'libsecret',
       'dependencies=': [],
       'extra_configure_flags': [
           '--disable-static',
           # See above.
           '--disable-introspection',
       ],
       'pre_build': 'scripts/pre-build/autoreconf.sh',
       'includes': ['standard_instrumented_package_target.gypi'],
     },
+    {
+      # Creates a stub to convince NSS to not load the system-wide uninstrumented library.
+      # It appears that just an empty file is enough.
+      'package_name': 'libcredentialkit_pkcs11-stub',
+      'target_name': '<(_sanitizer_type)-<(_package_name)',
+      'type': 'none',
+      'actions': [
+        {
+          'action_name': '<(_package_name)',
+          'inputs': [],
+          'outputs': [
+            '<(PRODUCT_DIR)/instrumented_libraries/<(_sanitizer_type)/<(_package_name).txt',

[hans, 2016/01/27 23:44:04]

I'm not familiar with this GYP file.

It's used for building instrumented libraries, not Chromium, right?

Looks reasonable as far as I can tell, but I'm not sure I'm the right person to
review this.

+          ],
+          'action': [
+            'touch',
+            '<(PRODUCT_DIR)/instrumented_libraries/<(_sanitizer_type)/lib/libcredentialkit_pkcs11.so.0',
+            '<(PRODUCT_DIR)/instrumented_libraries/<(_sanitizer_type)/<(_package_name).txt',
+          ],
+        },
+      ],
+    },
   ],
 }