Reuse existing dart boringssl BUILD.gn

Author: aam

DEPS

@@ -300,7 +300,7 @@ deps = {
   'src/flutter/third_party/yapf':
   Var('flutter_git') + '/third_party/yapf' + '@' + '212c5b5ad8e172d2d914ae454c121c89cccbcb35',
 
-  'src/flutter/third_party/boringssl/src':
+  'src/flutter/third_party/dart/third_party/boringssl/src':
   'https://boringssl.googlesource.com/boringssl.git' + '@' + Var('dart_boringssl_rev'),
 
   'src/flutter/third_party/perfetto':

build/secondary/third_party/boringssl/BUILD.gn

@@ -3,5 +3,5 @@
 # found in the LICENSE file.
 
 group("boringssl") {
-  public_deps = [ "//flutter/third_party/boringssl" ]
+  public_deps = [ "//flutter/third_party/dart/third_party/boringssl" ]
 }

third_party/boringssl/BUILD.gn

@@ -2,92 +2,12 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//build/config/android/config.gni")
-import("//build/config/arm.gni")
-import("//build/config/compiler/compiler.gni")
-import("//build/config/sanitizers/sanitizers.gni")
-import("//build_overrides/build.gni")
-import("src/gen/sources.gni")
-
-# Config for us and everybody else depending on BoringSSL.
-config("external_config") {
-  include_dirs = [ "src/include" ]
-  if (is_component_build) {
-    defines = [ "BORINGSSL_SHARED_LIBRARY" ]
-  }
-}
-
-# The config used by the :boringssl component itself, and the fuzzer copies.
-config("component_config") {
-  visibility = [ ":*" ]
-  configs = [ ":internal_config" ]
-  defines = [ "BORINGSSL_IMPLEMENTATION" ]
-
+config("boringssl_config") {
   cflags_c = [ "-std=c17" ]
 }
 
-# This config is used by anything that consumes internal headers. Tests consume
-# this rather than :component_config.
-config("internal_config") {
-  visibility = [ ":*" ]
-  defines = [
-    "OPENSSL_SMALL",
-    "OPENSSL_STATIC_ARMCAP",
-  ]
-  if (is_posix) {
-    defines += [ "_XOPEN_SOURCE=700" ]
-  }
-}
-
-config("no_asm_config") {
-  visibility = [ ":*" ]
-  defines = [ "OPENSSL_NO_ASM" ]
-}
-
-# TODO(crbug.com/42290535): Move Chromium's use of libpki to the public API and
-# unexport pki_internal_headers.
-all_sources = bcm_internal_headers + bcm_sources + crypto_internal_headers +
-              crypto_sources + ssl_internal_headers + ssl_sources + pki_sources
-all_headers = crypto_headers + ssl_headers + pki_headers + pki_internal_headers
-
-if (is_msan) {
-  # MSan instrumentation is incompatible with assembly optimizations.
-  # BoringSSL's GAS-compatible assembly knows how to detect MSan, but the NASM
-  # assembly does not, so we check for MSan explicitly.
-  source_set("boringssl_asm") {
-    visibility = [ ":*" ]
-    public_configs = [ ":no_asm_config" ]
-  }
-} else if (is_win && (current_cpu == "x86" || current_cpu == "x64")) {
-  # Windows' x86 and x86_64 assembly is built with NASM.
-  source_set("boringssl_asm") {
-    visibility = [ ":*" ]
-    public_configs = [ ":no_asm_config" ]
-  }
-} else {
-  # All other targets use GAS-compatible assembler. BoringSSL's assembly files
-  # are all wrapped in processor checks for the corresponding target, so there
-  # is no need to add target conditions in the build.
-  source_set("boringssl_asm") {
-    visibility = [ ":*" ]
-    sources = rebase_path(bcm_sources_asm + crypto_sources_asm, ".", "src")
-    include_dirs = [ "src/include" ]
-  }
-}
-
 source_set("boringssl") {
-  sources = rebase_path(all_sources, ".", "src")
-  public = rebase_path(all_headers, ".", "src")
-
-  if (is_win) {
-    configs += [ ":no_asm_config" ]
-  } else {
-    deps = [ ":boringssl_asm" ]
-  }
-
-  public_configs = [ ":external_config" ]
-  configs += [ ":component_config" ]
+  configs += [ ":boringssl_config" ]
 
-  configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [ "//build/config/compiler:no_chromium_code" ]
+  deps = [ "//flutter/third_party/dart/third_party/boringssl:boringssl" ]
 }