Enable SecureSocket on Fuchsia using BoringSSL

runtime/bin/BUILD.gn

 # Copyright (c) 2014, 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.
 
 import("gypi_contents.gni")
 
 declare_args() {
   # Whether to fall back to built-in root certificates when they cannot be
   # verified at the operating system level.
-  dart_use_fallback_root_certificates = false
+  dart_use_fallback_root_certificates = true

[Cutch, 2016/11/23 19:31:19]

why are we changing the default arguments here? Can't the Fuchsia build override
this?

 
   # The BUILD.gn file that we pull from chromium as part of zlib has a
   # dependence on //base, which we don't pull in. In a standalone build of the
   # VM, we set this to //runtime/bin/zlib where we have a BUILD.gn file without
   # a dependence on //base.
   dart_zlib_path = "//third_party/zlib"
 
   # Whether to link the standalone VM against tcmalloc. The standalone build of
   # the VM enables this only for Linux builds.
   dart_use_tcmalloc = false
@@ skipping 391 matching lines @@
     defines = []
     if (is_mac || is_ios) {
       libs = [
         "CoreFoundation.framework",
         "Security.framework",
       ]
 
       if (is_mac) {
         libs += [ "CoreServices.framework" ]
       }
-    } else if (defined(is_fuchsia) && is_fuchsia) {
-      defines += [ "DART_IO_SECURE_SOCKET_DISABLED" ]
     } else {
       deps = [
         "//third_party/boringssl",
       ]
     }
 
     sources = io_impl_sources_gypi + builtin_impl_sources_gypi
     sources += [
                  "builtin_natives.cc",
                  "io_natives.cc",
                  "io_natives.h",
                  "log_android.cc",
                  "log_linux.cc",
                  "log_macos.cc",
                  "log_win.cc",
                  "log.h",
                ] + extra_sources
 
-    if (is_linux || is_win) {
+    if (is_linux || is_win || (defined(is_fuchsia) && is_fuchsia)) {
       if (dart_use_fallback_root_certificates) {
         sources += [ "//third_party/root_certificates/root_certificates.cc" ]
       } else {
         defines += [ "DART_IO_ROOT_CERTS_DISABLED" ]
       }
     }
 
     include_dirs = [
       "..",
       "//third_party",
@@ skipping 388 matching lines @@
       # The only effect of DART_SHARED_LIB is to export the Dart API.
       "DART_SHARED_LIB",
     ]
     if (is_win) {
       libs = [ "dart.lib" ]
       abs_root_out_dir = rebase_path(root_out_dir)
       ldflags = [ "/LIBPATH:$abs_root_out_dir" ]
     }
   }
 }