Bug 1441860 - Fix the reference to the --rule-flex-toggle-color variable in rules.css. r=bgrins

browser/base/content/test/static/browser_parsable_css.js

@@ -105,9 +105,6 @@ let whitelist = [
   // Bug 1441857
   {propName: "--positionDurationBox-width-long",
    isFromDevTools: false},
-  // Bug 1441860
-  {propName: "--rule-flex-toggle-color",
-   isFromDevTools: true},
   // Bug 1441929
   {propName: "--theme-search-overlays-semitransparent",
    isFromDevTools: true},

devtools/client/themes/rules.css

@@ -472,7 +472,7 @@
 .ruleview-flex {
   background: url("chrome://devtools/skin/images/command-frames.svg");
   -moz-context-properties: fill;
-  fill: var(--rule-shape-toggle-color);
+  fill: var(--rule-flex-toggle-color);
   border-radius: 0;
   background-size: 1em;
 }