Fix typos in GMC overlay controls flag in chrome://flags

Bug: 1107363
Change-Id: Ie97662d5f9a81ce10ffb568a9ed573a75282d4b8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2307471Reviewed-by: Becca Hughes <beccahughes@chromium.org>
Commit-Queue: Tommy Steimel <steimel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#789955}

chrome/browser/flag_descriptions.cc

@@ -1165,9 +1165,9 @@ const char kGlobalMediaControlsSeamlessTransferDescription[] =
     "also be enabled.";
 
 const char kGlobalMediaControlsOverlayControlsName[] =
-    "Enable overlay controls for Global Nedia Controls";
+    "Enable overlay controls for Global Media Controls";
 const char kGlobalMediaControlsOverlayControlsDescription[] =
-    "Allowing controls to be dragged out from Global Media Controls dialog."
+    "Allowing controls to be dragged out from Global Media Controls dialog. "
     "Requires #global-media-controls to also be enabled.";
 
 const char kGpuRasterizationName[] = "GPU rasterization";