Adding property to .NET ChromeOptions for perf logging preferences

Author: jimevans

dotnet/src/webdriver/Chrome/ChromeOptions.cs

@@ -663,7 +663,13 @@ private Dictionary<string, object> GeneratePerformanceLoggingPreferencesDictiona
             string tracingCategories = this.perfLoggingPreferences.TracingCategories;
             if (!string.IsNullOrEmpty(tracingCategories))
             {
+                // Adding both 'tracingCategories' and 'traceCategories' to the dictionary.
+                // The ChromeDriver documentation indicates one of these is correct; user
+                // reports indicate the other is correct. Until the proper preference name
+                // is validated by the Chromium development team, we'll send both, as the
+                // extraneous one should be ignored by the driver.
                 perfLoggingPrefsDictionary["tracingCategories"] = tracingCategories;
+                perfLoggingPrefsDictionary["traceCategories"] = tracingCategories;
             }
 
             perfLoggingPrefsDictionary["bufferUsageReportingInterval"] = Convert.ToInt64(this.perfLoggingPreferences.BufferUsageReportingInterval.TotalMilliseconds);