Mac: update traffic light inset for 10.16/11.0

New number via consultation with PM and UX.

Bug: 1098397
Change-Id: I9ddb3582974b199c8d820fc76026a064a21a4edc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2300320Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Leonard Grey <lgrey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#788716}

chrome/browser/ui/views/frame/browser_non_client_frame_view_mac.mm

@@ -130,7 +130,7 @@ gfx::Rect BrowserNonClientFrameViewMac::GetBoundsForTabStripRegion(
 
   // Do not draw caption buttons on fullscreen.
   if (!frame()->IsFullscreen()) {
-    constexpr int kCaptionWidth = 70;
+    const int kCaptionWidth = base::mac::IsAtMostOS10_15() ? 70 : 85;
     if (CaptionButtonsOnLeadingEdge())
       bounds.Inset(gfx::Insets(0, kCaptionWidth, 0, 0));
     else