Revert BoringSSL Roll

third_party/boringssl/boringssl_configurations.gypi

 # Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # This file is included to modify the configurations to build third-party
 # code from BoringSSL.
+# This code is C code, not C++, and is not warning-free, so we need to remove
+# C++-specific flags, and add flags to supress the warnings in the code.
 {
+  'variables': {
+    # Used by third_party/nss, which is from Chromium.
+    # Include the built-in set of root certificate authorities.
+    'exclude_nss_root_certs': 0,
+    'os_posix%': 1,
+    'os_bsd%': 0,
+    'chromeos%': 0,
+    'clang%': 0,
+  },
   'target_defaults': {
+    'cflags': [
+      '-w',
+      '-UHAVE_CVAR_BUILT_ON_SEM',
+    ],
     # Removes these flags from the list cflags.
     'cflags!': [
+      # NSS code from upstream mozilla builds with warnings,
+      # so we must allow warnings without failing.
+      '-Werror',
+      '-Wall',
       '-ansi',
       # Not supported for C, only for C++.
       '-Wnon-virtual-dtor',
       '-Wno-conversion-null',
       '-fno-rtti',
       '-fvisibility-inlines-hidden',
       '-Woverloaded-virtual',
     ],
+    'configurations': {
+      'Dart_Base': {
+        'xcode_settings': {
+          'WARNING_CFLAGS': [
+            '-w',
+          ],
+          'WARNING_CFLAGS!': [
+            '-Wall',
+            '-Wextra',
+          ],
+        },
+      },
+      # Dart_Macos_Debug and Dart_Macos_Release are merged after
+      # Dart_Macos_Base, so we can override the 'ansi' and '-Werror' flags set
+      # at the global level in tools/gyp/configurations_xcode.gypi.
+      'Dart_Macos_Debug': {
+        'abstract': 1,
+        'xcode_settings': {
+          # Remove 'ansi' setting.
+          'GCC_C_LANGUAGE_STANDARD': 'c99',
+          'GCC_TREAT_WARNINGS_AS_ERRORS': 'NO', # -Werror off
+        },
+      },
+      'Dart_Macos_Release': {
+        'abstract': 1,
+        'xcode_settings': {
+          # Remove 'ansi' setting.
+          'GCC_C_LANGUAGE_STANDARD': 'c99',
+          'GCC_TREAT_WARNINGS_AS_ERRORS': 'NO', # -Werror off
+        },
+      },
+      # Disable hand-coded assembly routines on ARMv6 and ARMv5TE.
+      'Dart_armv6_Base': {
+        'abstract': 1,
+        'defines': [
+          'OPENSSL_NO_ASM',
+        ],
+      },
+      'Dart_armv5te_Base': {
+        'abstract': 1,
+        'defines': [
+          'OPENSSL_NO_ASM',
+        ],
+      },
+      # TODO(24321): Also disable temporarily on arm64. Reenable after the next
+      # roll.
+      'Dart_arm64_Base': {
+        'abstract': 1,
+        'defines': [
+          'OPENSSL_NO_ASM',
+        ],
+      },
+      # Android 64-bit dbc build is for arm64, disable temporarily as well.
+      'Dart_Android_arm64_Base': {
+        'abstract': 1,
+        'defines': [
+          'OPENSSL_NO_ASM',
+        ],
+      },
+      # When being built for Android nss expects __linux__ to be defined.
+      'Dart_Android_Base': {
+        'target_conditions': [
+          ['_toolset=="host"', {
+            'defines!': [
+              'ANDROID',
+            ],
+            # Define __linux__ on Android build for NSS.
+            'defines': [
+              '__linux__',
+            ],
+            'cflags!': [
+              '-U__linux__',
+            ],
+          }],
+          ['_toolset=="target"', {
+            'defines': [
+              '__linux__',
+              'CHECK_FORK_GETPID',  # Android does not provide pthread_atfork.
+              '__USE_LARGEFILE64',
+            ],
+            # Define __linux__ on Android build for NSS.
+            'cflags!': [
+              '-U__linux__',
+            ],
+          }]
+        ],
+      },
+    },
   },
 }