Fix test for upcoming DevTools change

In
https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2011080
the `detectColorFormat` is moved onto Common.Settings instead.

Bug: 1011811
Change-Id: Ib43aa4774793c307f897f7992ac46273f949b694
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2013042
Auto-Submit: Tim van der Lippe <tvanderlippe@chromium.org>
Commit-Queue: Paul Lewis <aerotwist@chromium.org>
Reviewed-by: Paul Lewis <aerotwist@chromium.org>
Cr-Commit-Position: refs/heads/master@{#733958}

third_party/blink/web_tests/http/tests/devtools/elements/styles-1/edit-value-url-with-color.js

@@ -23,7 +23,7 @@
   var maxIndex = 11;
   var idIndex = 1;
 
-  Common.Color.detectColorFormat = function() {
+  Common.Color.detectColorFormat = Common.Settings.detectColorFormat = function() {
     return Common.Color.Format.RGB;
   };