Fix a typo in about_flags.cc.

In the |kFeatureEntries| struct, each FeatureEntry has a name and a
description. As is, for "message-center-redesign",
|kMessageCenterRedesignName| is used in both fields and
|kMessageCenterRedesignDescription| goes unused. Fix the typo so the
description is set to |kMessageCenterRedesignDescription|.

Change-Id: I130b795b656fdb27c4474e785ab83db230176d77
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2037082Reviewed-by: Ahmed Mehfooz <amehfooz@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#738419}

chrome/browser/about_flags.cc

@@ -1884,7 +1884,7 @@ const FeatureEntry kFeatureEntries[] = {
      flag_descriptions::kTrimOnMemoryPressureDescription, kOsCrOS,
      FEATURE_VALUE_TYPE(performance_manager::features::kTrimOnMemoryPressure)},
     {"message-center-redesign", flag_descriptions::kMessageCenterRedesignName,
-     flag_descriptions::kMessageCenterRedesignName, kOsCrOS,
+     flag_descriptions::kMessageCenterRedesignDescription, kOsCrOS,
      FEATURE_VALUE_TYPE(ash::features::kUnifiedMessageCenterRefactor)},
 #endif  // OS_CHROMEOS
     {