[iOS] Fix UserAction typo

[LocationBarViewController visitCopiedLink] should log
"Mobile.OmniboxContextMenu.VisitCopiedLink" instead of
"Mobile.OmniboxContextMenu.SearchCopiedImage"

Fixed: 1108682

Change-Id: Icec446acb57d6821f51c181352c0399dca170701
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2315224
Commit-Queue: Stepan Khapugin <stkhapugin@chromium.org>
Reviewed-by: Stepan Khapugin <stkhapugin@chromium.org>
Auto-Submit: Mike Dougherty <michaeldo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791202}

ios/chrome/browser/ui/location_bar/location_bar_view_controller.mm

@@ -513,8 +513,7 @@ const double kFullscreenProgressBadgeViewThreshold = 0.85;
 }
 
 - (void)visitCopiedLink:(id)sender {
-  RecordAction(
-      UserMetricsAction("Mobile.OmniboxContextMenu.SearchCopiedImage"));
+  RecordAction(UserMetricsAction("Mobile.OmniboxContextMenu.VisitCopiedLink"));
   [self pasteAndGo:sender];
 }