DevTools: [CSS] do not treat random css comments as disabled properties

third_party/WebKit/Source/devtools/front_end/sdk/CSSStyleModel.js

Index: third_party/WebKit/Source/devtools/front_end/sdk/CSSStyleModel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/CSSStyleModel.js b/third_party/WebKit/Source/devtools/front_end/sdk/CSSStyleModel.js
index 8492d514956bd59447ff8401666c7d405211d967..c94f7ccb77222744358af85e229a0531c7b45172 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/CSSStyleModel.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/CSSStyleModel.js
@@ -1439,9 +1439,9 @@ WebInspector.CSSProperty.prototype = {
         function processToken(token, tokenType, column, newColumn)
         {
             if (!insideProperty) {
-                var isDisabledProperty = tokenType && tokenType.includes("css-comment") && token.includes(":");
+                var disabledProperty = tokenType && tokenType.includes("css-comment") && isDisabledProperty(token);
                 var isPropertyStart = tokenType && (tokenType.includes("css-meta") || tokenType.includes("css-property"));
-                if (isDisabledProperty) {
+                if (disabledProperty) {
                     result = result.trimRight() + indentation + token;
                 } else if (isPropertyStart) {
                     insideProperty = true;
@@ -1461,6 +1461,19 @@ WebInspector.CSSProperty.prototype = {
                 propertyText += token;
             }
         }
+
+        /**
+         * @param {string} text
+         * @return {boolean}
+         */
+        function isDisabledProperty(text)
+        {
+            var colon = text.indexOf(":");
+            if (colon === -1)
+                return false;
+            var propertyName = text.substring(2, colon).trim();
+            return CSS.supports(propertyName, "initial") || propertyName.startsWith("-moz-") || propertyName.startsWith("-o-") || propertyName.startsWith("-webkit-") || propertyName.startsWith("-ms-");

[pfeldman, 2016/01/04 21:27:01]

You should either query the target (generated) css property set or whitelist all
of the supported ones (get them from the cm highlight).

[lushnikov, 2016/01/11 23:52:11]

How are your suggestions better than this? 

+        }
     },
 
     /**