Support a user-provided string for the TLS ALPN extension.

webrtc/rtc_base/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/crypto.gni")
 import("//build/config/ui.gni")
@@ skipping 1018 matching lines @@
       sources += [
         "win32_unittest.cc",
         "win32window_unittest.cc",
       ]
     }
     if (is_mac) {
       sources += [ "macutils_unittest.cc" ]
     }
     if (is_posix) {
       sources += [
+        "openssladapter_unittest.cc",
         "ssladapter_unittest.cc",
         "sslidentity_unittest.cc",
         "sslstreamadapter_unittest.cc",
       ]
     }
     deps = [
       ":rtc_base_tests_main",
       ":rtc_base_tests_utils",
       "../test:test_support",
     ]
     public_deps = [
       ":rtc_base",
     ]
     configs += [ ":rtc_base_unittests_config" ]
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
+    if (build_with_chromium) {
+      include_dirs = [ "../../boringssl/src/include" ]
+    }
+    if (rtc_build_ssl) {
+      deps += [ "//third_party/boringssl" ]
+    } else {
+      configs += [ ":external_ssl_library" ]
+    }
   }
 }
 
 if (is_android) {
   android_library("base_java") {
     java_files = [
       "java/src/org/webrtc/ContextUtils.java",
       "java/src/org/webrtc/Logging.java",
       "java/src/org/webrtc/Size.java",
       "java/src/org/webrtc/ThreadUtils.java",
     ]
 
     # TODO(sakal): Fix build hooks crbug.com/webrtc/8148
     no_build_hooks = true
   }
 }