Bug 1556855 part 2: Update tests to assume that 'layout.css.prefixes.webkit' is already true. r=mats

(The pref is about to be removed, but even before its removal, it defaults to
'true' so these tests don't need to bother setting/checking it.)

Differential Revision: https://phabricator.services.mozilla.com/D33805

--HG--
extra : moz-landing-system : lando

browser/base/content/test/performance/browser_preferences_usage.js

@@ -86,10 +86,6 @@ add_task(async function startup() {
       min: 200,
       max: 350,
     },
-    "layout.css.prefixes.webkit": {
-      min: 135,
-      max: 170,
-    },
     "layout.css.dpi": {
       min: 45,
       max: 81,

dom/animation/test/mozilla/test_discrete_animations.html

@@ -9,7 +9,6 @@ setup({explicit_done: true});
 SpecialPowers.pushPrefEnv(
   { "set": [
     ["layout.css.osx-font-smoothing.enabled", true],
-    ["layout.css.prefixes.webkit", true]
   ] },
   function() {
     window.open("file_discrete_animations.html");

layout/reftests/text-stroke/reftest.list

@@ -1,6 +1,5 @@
 # basic tests for webkit-text-stroke
 # fuzzy is needed here for platform dependent backends
-default-preferences pref(layout.css.prefixes.webkit,true)
 
 # These fail on Linux without webrender due to lack of antialiasing of the HTML text stroke
 fuzzy(0-64,0-47) fails-if(gtkWidget&&!webrender) == webkit-text-stroke-property-001.html webkit-text-stroke-property-001-ref.html

layout/reftests/webkit-box/reftest.list

@@ -1,6 +1,5 @@
 # This directory contains tests for "display: -webkit-box" and associated
-# CSS properties. These tests require webkit prefix support to be enabled.
-default-preferences pref(layout.css.prefixes.webkit,true)
+# CSS properties.
 
 # Tests for abspos children inside of a -webkit-box:
 == webkit-box-abspos-children-1.html webkit-box-abspos-children-1-ref.html

layout/reftests/webkit-gradient/reftest.list

@@ -1,6 +1,4 @@
 # This directory contains tests for -webkit-gradient() expressions.
-# They require webkit prefix support to be enabled.
-default-preferences pref(layout.css.prefixes.webkit,true)
 
 # In this test, we don't render a "-webkit-gradient" exactly correctly.
 # (It's just here to ensure that our approximate/do-something rendering doesn't

layout/style/test/test_webkit_flex_display.html

@@ -21,9 +21,7 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=1274096
 /** Test for Bug 1274096 **/
 
 SimpleTest.waitForExplicitFinish();
-SpecialPowers.pushPrefEnv(
-  {"set": [["layout.css.prefixes.webkit", true]]}
-).then(runTest);
+runTest();
 
 function runTest() {
   testValue("display", "-webkit-flex", "flex");

testing/profiles/unittest-features/user.js

@@ -16,8 +16,6 @@ user_pref("layout.css.grid-template-subgrid-value.enabled", true);
 user_pref("layout.css.initial-letter.enabled", true);
 // Enable -webkit-{min|max}-device-pixel-ratio media queries for testing
 user_pref("layout.css.prefixes.device-pixel-ratio-webkit", true);
-// Enable webkit prefixed CSS features for testing
-user_pref("layout.css.prefixes.webkit", true);
 // Enable Media Source Extensions for testing
 user_pref("media.mediasource.mp4.enabled", true);
 user_pref("media.mediasource.webm.enabled", true);

testing/web-platform/meta/compat/webkit-text-fill-color-currentColor.html.ini

@@ -1,2 +0,0 @@
-[webkit-text-fill-color-currentColor.html]
-  prefs: [layout.css.prefixes.webkit:true]

testing/web-platform/meta/compat/webkit-text-fill-color-property-002.html.ini

@@ -1,5 +1,4 @@
 [webkit-text-fill-color-property-002.html]
-  prefs: [layout.css.prefixes.webkit:true]
   expected:
     if (os == "android") and not e10s: FAIL
     if (os == "android") and e10s: FAIL

testing/web-platform/meta/compat/webkit-text-fill-color-property-003.html.ini

@@ -1,2 +0,0 @@
-[webkit-text-fill-color-property-003.html]
-  prefs: [layout.css.prefixes.webkit:true]

testing/web-platform/meta/compat/webkit-text-fill-color-property-004.html.ini

@@ -1,2 +0,0 @@
-[webkit-text-fill-color-property-004.html]
-  prefs: [layout.css.prefixes.webkit:true]

testing/web-platform/meta/compat/webkit-text-fill-color-property-005.html.ini

@@ -1,2 +0,0 @@
-[webkit-text-fill-color-property-005.html]
-  prefs: [layout.css.prefixes.webkit:true]

testing/web-platform/meta/compat/webkit-text-fill-color-property-006.html.ini

@@ -1,2 +0,0 @@
-[webkit-text-fill-color-property-006.html]
-  prefs: [layout.css.prefixes.webkit:true]