CrOS GMC: fix flag description typo.

Change-Id: I6812f253ad2fde354219816298ebfd0c2f511f5f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2427080
Auto-Submit: Jazz Xu <jazzhsu@chromium.org>
Commit-Queue: Jazz Xu <jazzhsu@chromium.org>
Commit-Queue: Tommy Steimel <steimel@chromium.org>
Reviewed-by: Tommy Steimel <steimel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810051}

chrome/browser/flag_descriptions.cc

@@ -1207,7 +1207,7 @@ const char kGlobalMediaControlsForCastDescription[] =
     "#global-media-controls and #cast-media-route-provider to also be enabled.";
 
 const char kGlobalMediaControlsForChromeOSName[] =
-    "Global Media Conrols for ChromeOS";
+    "Global Media Controls for ChromeOS";
 const char kGlobalMediaControlsForChromeOSDescription[] =
     "Enable Global Media Controls UI in shelf and quick settings.";