Add dns-httpssvc flag for HTTPSSVC experiment

Bug: 1023488
Change-Id: Ibedc40f3713e4b20d9733ec15576506b498db49f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1980757
Commit-Queue: Dan McArdle <[email protected]>
Reviewed-by: Eric Orth <[email protected]>
Cr-Commit-Position: refs/heads/master@{#739993}
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 4e4948bc..7f64168 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -4587,6 +4587,11 @@
      flag_descriptions::kDecodeLossyWebPImagesToYUVDescription, kOsAll,
      FEATURE_VALUE_TYPE(blink::features::kDecodeLossyWebPImagesToYUV)},
 
+    {"dns-httpssvc", flag_descriptions::kDnsHttpssvcName,
+     flag_descriptions::kDnsHttpssvcDescription,
+     kOsMac | kOsWin | kOsCrOS | kOsAndroid,
+     FEATURE_VALUE_TYPE(features::kDnsHttpssvc)},
+
     {"dns-over-https", flag_descriptions::kDnsOverHttpsName,
      flag_descriptions::kDnsOverHttpsDescription,
      kOsMac | kOsWin | kOsCrOS | kOsAndroid,