[spelling] existance to existence

chromeos/system/statistics_provider.h

Index: chromeos/system/statistics_provider.h
diff --git a/chromeos/system/statistics_provider.h b/chromeos/system/statistics_provider.h
index f8c44fbf6b33a84d24ae81889010188767ef8eca..7f8b3c23b9afa65400a3f68cfe4b7e31ea842998 100644
--- a/chromeos/system/statistics_provider.h
+++ b/chromeos/system/statistics_provider.h
@@ -98,7 +98,7 @@ class CHROMEOS_EXPORT StatisticsProvider {
       bool load_oem_manifest) = 0;
 
   // Returns true if the named machine statistic (e.g. "hardware_class") is
-  // found and stores it in |result| (if provided). Probing for the existance of
+  // found and stores it in |result| (if provided). Probing for the existence of
   // a statistic by setting |result| to nullptr supresses the usual warning in
   // case the statistic is not found. Safe to call from any thread except the
   // task runner passed to Initialize() (e.g. FILE). This may block if called