Backend for css rule tracking

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

Index: third_party/WebKit/Source/devtools/front_end/sdk/CSSRule.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/CSSRule.js b/third_party/WebKit/Source/devtools/front_end/sdk/CSSRule.js
index 8829065024bc0c7d0c6e5dfded2ece27ca452104..d970f49a56ec8010fda89402c6119c9302020c1a 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/CSSRule.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/CSSRule.js
@@ -103,13 +103,15 @@ WebInspector.CSSRule.prototype = {
  * @extends {WebInspector.CSSRule}
  * @param {!WebInspector.CSSModel} cssModel
  * @param {!CSSAgent.CSSRule} payload
+ * @param {boolean=} wasUsed
  */
-WebInspector.CSSStyleRule = function(cssModel, payload)
+WebInspector.CSSStyleRule = function(cssModel, payload, wasUsed)
 {
     WebInspector.CSSRule.call(this, cssModel, payload);
 
     this._reinitializeSelectors(payload.selectorList);
     this.media = payload.media ? WebInspector.CSSMedia.parseMediaArrayPayload(cssModel, payload.media) : [];
+    this.wasUsed = wasUsed;
 };
 
 /**