Merge branch 'remove-scss-prefix-linear-gradient' into 'master'

Remove vendor prefixes for linear-gradient CSS ## What does this MR do? Removes the vendor prefixes for linear-gradient and the linear-gradient mixin since they are no longer needed with our latest and greatest browser (as per [annabeldunstone](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/5762#note_14353141)) ## Are there points in the code the reviewer needs to double check? None ## Why was this MR needed? Reduces unnecessary CSS ## Screenshots (if relevant) None ## Does this MR meet the acceptance criteria? - [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added - Tests - [x] All builds are passing - [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides) - [x] Branch has no merge conflicts with `master` (if you do - rebase it please) - [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits) ## What are the relevant issue numbers? * Closes #21558 See merge request !6063

Merge branch 'remove-scss-prefix-linear-gradient' into 'master'
0357df0c · Annabel Dunstone Gray · 43ddf0ca · 5f7f98ff · 0357df0c · 0357df0c
Commit 0357df0c authored Aug 30, 2016 by Annabel Dunstone Gray
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CHANGELOG CHANGELOG +1 -0

nav.scss app/assets/stylesheets/framework/nav.scss +1 -4

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--- a/CHANGELOG
+++ b/CHANGELOG
@@ -3,6 +3,7 @@ Please view this file on the master branch, on stable branches it's out of date.
 v 8.12.0 (unreleased)
  - Make push events have equal vertical spacing.
  - Add two-factor recovery endpoint to internal API !5510
+  - Remove vendor prefixes for linear-gradient CSS (ClemMakesApps)
  - Add font color contrast to external label in admin area (ClemMakesApps)
  - Change logo animation to CSS (ClemMakesApps)
  - Change merge_error column from string to text type

--- a/app/assets/stylesheets/framework/nav.scss
+++ b/app/assets/stylesheets/framework/nav.scss
@@ -8,10 +8,7 @@
  height: 30px;
  transition-duration: .3s;
  -webkit-transform: translateZ(0);
-  background: -webkit-linear-gradient($gradient-direction, rgba($gradient-color, 0.4), $gradient-color 45%);
-  background: -o-linear-gradient($gradient-direction, rgba($gradient-color, 0.4), $gradient-color 45%);
-  background: -moz-linear-gradient($gradient-direction, rgba($gradient-color, 0.4), $gradient-color 45%);
-  background: linear-gradient($gradient-direction, rgba($gradient-color, 0.4), $gradient-color 45%);
+  background: linear-gradient(to $gradient-direction, $gradient-color 45%, rgba($gradient-color, 0.4));

  &.scrolling {
    visibility: visible;