Revert of Enable DRP config service by default

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index b6a45b66b74d3f1083603aa4c7128f60cf746fb5..7691beb1d656137a7a121bd9aa7824236a71cd44 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1470,6 +1470,11 @@
      IDS_FLAGS_DATA_REDUCTION_PROXY_RESET_SAVINGS_DESCRIPTION, kOsAll,
      SINGLE_VALUE_TYPE(
          data_reduction_proxy::switches::kClearDataReductionProxyDataSavings)},
+    {"enable-data-reduction-proxy-config-client",
+     IDS_FLAGS_DATA_REDUCTION_PROXY_CONFIG_CLIENT_NAME,
+     IDS_FLAGS_DATA_REDUCTION_PROXY_CONFIG_CLIENT_DESCRIPTION, kOsAll,
+     SINGLE_VALUE_TYPE(data_reduction_proxy::switches::
+                           kEnableDataReductionProxyConfigClient)},
     {"allow-insecure-localhost", IDS_ALLOW_INSECURE_LOCALHOST,
      IDS_ALLOW_INSECURE_LOCALHOST_DESCRIPTION, kOsAll,
      SINGLE_VALUE_TYPE(switches::kAllowInsecureLocalhost)},
@@ -1903,6 +1908,16 @@
     return true;
   }
 
+  // enable-data-reduction-proxy-config-client is only available for Chromium
+  // builds and the Canary/Dev channels.
+  if (!strcmp("enable-data-reduction-proxy-config-client",
+              entry.internal_name) &&
+      channel != version_info::Channel::DEV &&
+      channel != version_info::Channel::CANARY &&
+      channel != version_info::Channel::UNKNOWN) {
+    return true;
+  }
+
   return false;
 }