Add explicit chrome://flags entry for MV Tiles Dynamic Spacing

Change-Id: Ie228c2600d06aad730edfc2b5dbc1098da7dc26c
Fixed: 1346120
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3858607
Commit-Queue: Tomasz Wiszkowski <[email protected]>
Reviewed-by: Patrick Noland <[email protected]>
Auto-Submit: Tomasz Wiszkowski <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1039959}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 1d8ea134..d150825 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -1953,6 +1953,12 @@
     "Display a list of frequently visited pages from history as a single row "
     "with a carousel instead of one URL per line.";
 
+const char kOmniboxMostVisitedTilesDynamicSpacingName[] =
+    "Omnibox Most Visited Tiles Dynamic Spacing";
+const char kOmniboxMostVisitedTilesDynamicSpacingDescription[] =
+    "Exposes ~4.5 MV tiles in a carousel on a small form factor "
+    "devices, aligning the visual spacing with the NTP.";
+
 const char kOmniboxMostVisitedTilesTitleWrapAroundName[] =
     "Omnibox Most Visited Tiles Title wrap around";
 const char kOmniboxMostVisitedTilesTitleWrapAroundDescription[] =