Bug 1217086 - Enable CSS Grid by default. r=dholbert

modules/libpref/init/all.js

@@ -2607,11 +2607,7 @@ pref("layout.css.variables.enabled", true);
 pref("layout.css.overflow-clip-box.enabled", false);
 
 // Is support for CSS grid enabled?
-#ifdef RELEASE_OR_BETA
-pref("layout.css.grid.enabled", false);
-#else
 pref("layout.css.grid.enabled", true);
-#endif
 
 // Is support for CSS "grid-template-{columns,rows}: subgrid X" enabled?
 pref("layout.css.grid-template-subgrid-value.enabled", false);

testing/profiles/prefs_general.js

@@ -161,8 +161,7 @@ user_pref("datareporting.healthreport.about.reportUrl", "http://%(server)s/about
 // Make sure CSS error reporting is enabled for tests
 user_pref("layout.css.report_errors", true);
 
-// Enable CSS Grid for testing
-user_pref("layout.css.grid.enabled", true);
+// Enable CSS Grid 'subgrid' feature for testing
 user_pref("layout.css.grid-template-subgrid-value.enabled", true);
 
 // Enable CSS 'contain' for testing