Enable AudioServiceAudioStreams by default on Mac.

Bug: 845892
Change-Id: I66b0fb77fdc742b9913c2d7d20e0bbc34f66eacc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1680253
Reviewed-by: Steven Holte <holte@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Reviewed-by: Bret Sepulveda <bsep@chromium.org>
Reviewed-by: Olga Sharonova <olka@chromium.org>
Commit-Queue: Armando Miraglia <armax@chromium.org>
Cr-Commit-Position: refs/heads/master@{#673971}
base::string16 SubBrowserName(const char* fmt) {
  return base::UTF8ToUTF16(base::StringPrintf(
      fmt, l10n_util::GetStringUTF8(IDS_PRODUCT_NAME).c_str()));
}

base::string16 SubBrowserName(const char* fmt) {
  return base::UTF8ToUTF16(base::StringPrintf(
      fmt, l10n_util::GetStringUTF8(IDS_PRODUCT_NAME).c_str()));
}
