Fix BoringSSL build and tests on OS X.

third_party/boringssl/boringssl.gyp

 # Copyright 2014 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.
 
 {
   'includes': [
     'boringssl_tests.gypi',
   ],
   'targets': [
     {
       'target_name': 'boringssl',
-      'type': 'static_library',
+      'type': '<(component)',
       'includes': [
         'boringssl.gypi',
       ],
       'sources': [
         '<@(boringssl_lib_sources)',
       ],
       'conditions': [
         ['target_arch == "arm"', {
           'sources': [ '<@(boringssl_linux_arm_sources)' ],
         }],
@@ skipping 22 matching lines @@
               'sources': [ '<@(boringssl_win_x86_64_sources)' ],
             }],
             ['OS != "mac" and OS != "linux" and OS != "win" and OS != "android"', {
               'defines': [ 'OPENSSL_NO_ASM' ],
             }],
           ]
         }],
         ['target_arch != "arm" and target_arch != "ia32" and target_arch != "x64"', {
           'defines': [ 'OPENSSL_NO_ASM' ],
         }],
+        ['component == "shared_library"', {
+          'xcode_settings': {
+            'GCC_SYMBOLS_PRIVATE_EXTERN': 'NO',  # no -fvisibility=hidden
+          },
+          'cflags!': ['-fvisibility=hidden'],
+        }],
       ],
       'include_dirs': [
         'src/include',
         # This is for arm_arch.h, which is needed by some asm files. Since the
         # asm files are generated and kept in a different directory, they
         # cannot use relative paths to find this file.
         'src/crypto',
       ],
       'direct_dependent_settings': {
         'include_dirs': [
@@ skipping 10 matching lines @@
       'dependencies': [
         '<@(boringssl_test_targets)',
         '../../base/base.gyp:base',
         '../../base/base.gyp:run_all_unittests',
         '../../base/base.gyp:test_support_base',
         '../../testing/gtest.gyp:gtest',
       ],
     },
   ],
 }