cocoa: move FRE search bubble up a bit

chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm

Index: chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
diff --git a/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm b/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
index db3deadfa561678f2e6e5901f17dc3e91007407e..34466bebf20393fada096716d7317829d8a74ec9 100644
--- a/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
+++ b/chrome/browser/ui/cocoa/location_bar/location_bar_view_mac.mm
@@ -77,10 +77,6 @@
 
 namespace {
 
-// Vertical space between the bottom edge of the location_bar and the first run
-// bubble arrow point.
-const static int kFirstRunBubbleYOffset = 1;
-
 const int kDefaultIconSize = 16;
 
 // The minimum width the URL should have for the verbose state to be shown.
@@ -656,9 +652,13 @@ new ManagePasswordsDecoration(command_updater, this)),
   if (!field_ || ![field_ window])
     return;
 
-  // Point the bubble's arrow at the middle of the bottom of the page info icon.
-  const NSPoint kOffset =
-      NSMakePoint(info_bubble::kBubbleArrowXOffset, kFirstRunBubbleYOffset);
+  // Point the bubble's arrow at the middle of the page info icon. The x offset
+  // isn't the exact center, but this behavior matches other platforms and it
+  // looks better in practice since the arrow ends up between the handle and
+  // lens of the magnifying glass.
+  const NSPoint kOffset = NSMakePoint(
+      info_bubble::kBubbleArrowXOffset,
+      NSHeight([field_ frame]) / 2.0 - info_bubble::kBubbleArrowHeight);
   [FirstRunBubbleController showForView:field_
                                  offset:kOffset
                                 browser:browser_