DevTools: fix CSS parser to properly report last parsed chunk

Source/devtools/front_end/CSSParser.js

Index: Source/devtools/front_end/CSSParser.js
diff --git a/Source/devtools/front_end/CSSParser.js b/Source/devtools/front_end/CSSParser.js
index 1c379c4a791530c114c15974c2a70f6b77b871ad..5ac9f5414be471c2511c32278d4a1809c89f9b82 100644
--- a/Source/devtools/front_end/CSSParser.js
+++ b/Source/devtools/front_end/CSSParser.js
@@ -88,7 +88,7 @@ WebInspector.CSSParser.prototype = {
         for (var i = 0; i < chunk.length; ++i)
             this._rules.push(chunk[i]);
 
-        if (data.index === data.total - 1)
+        if (data.isLastChunk)
             this._onFinishedParsing();
         this.dispatchEventToListeners(WebInspector.CSSParser.Events.RulesParsed);
     },
@@ -104,7 +104,7 @@ WebInspector.CSSParser.prototype = {
 }
 
 /**
- * @typedef {{index: number, total: number, chunk: !Array.<!WebInspector.CSSParser.Rule>}}
+ * @typedef {{isLastChunk: boolean, chunk: !Array.<!WebInspector.CSSParser.Rule>}}
  */
 WebInspector.CSSParser.DataChunk;