[ios] Fix oversized hover effect on NTP omnibox

The NTP omnibox pointer hover effect looks slightly oversized.
This CL reduces it by 1 point.

Bug: 1073961
Change-Id: Idd6daa3952cf4521083c2110a6d6b5645157f6b5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2203018Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Commit-Queue: edchin <edchin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#768985}

ios/chrome/browser/ui/content_suggestions/content_suggestions_header_view_controller.mm

@@ -628,9 +628,11 @@ using base::UserMetricsAction;
 - (UIPointerStyle*)pointerInteraction:(UIPointerInteraction*)interaction
                        styleForRegion:(UIPointerRegion*)region
     API_AVAILABLE(ios(13.4)) {
-  UIBezierPath* path = [UIBezierPath
-      bezierPathWithRoundedRect:interaction.view.bounds
-                   cornerRadius:interaction.view.bounds.size.height];
+  // Without this, the hover effect looks slightly oversized.
+  CGRect rect = CGRectInset(interaction.view.bounds, 1, 1);
+  UIBezierPath* path =
+      [UIBezierPath bezierPathWithRoundedRect:rect
+                                 cornerRadius:rect.size.height];
   UIPreviewParameters* parameters = [[UIPreviewParameters alloc] init];
   parameters.visiblePath = path;
   UITargetedPreview* preview =