[signin] Enable SupportOAuthOutageInDice feature by default.

Bug: 1115247
Change-Id: I42b0c92da476a1c7f094209de22a6756200ac924
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2398109Reviewed-by: David Roger <droger@chromium.org>
Commit-Queue: Diana Zagidullina <dizg@google.com>
Cr-Commit-Position: refs/heads/master@{#805256}

chrome/browser/signin/dice_response_handler.cc

@@ -37,8 +37,8 @@ const int kDiceTokenFetchTimeoutSeconds = 10;
 // there was OAuth outage in Dice.
 const int kLockAccountReconcilorTimeoutHours = 12;
 
-const base::Feature kSupportOAuthOutageInDice{
-    "SupportOAuthOutageInDice", base::FEATURE_DISABLED_BY_DEFAULT};
+const base::Feature kSupportOAuthOutageInDice{"SupportOAuthOutageInDice",
+                                              base::FEATURE_ENABLED_BY_DEFAULT};
 
 namespace {