Fix name for UKM parse start metric.

chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer.cc

Index: chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer.cc
diff --git a/chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer.cc b/chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer.cc
index 80da0c0e0bca88165b700d3f77c2272b0daf2e0c..2b8032558bc2a2c09a5ada29f19d4386daa1a8c2 100644
--- a/chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer.cc
+++ b/chrome/browser/page_load_metrics/observers/ukm_page_load_metrics_observer.cc
@@ -11,7 +11,7 @@
 namespace internal {
 
 const char kUkmPageLoadEventName[] = "PageLoad";
-const char kUkmParseStartName[] = "ParseTiming.ParseStart";
+const char kUkmParseStartName[] = "ParseTiming.NavigationToParseStart";
 const char kUkmDomContentLoadedName[] =
     "DocumentTiming.NavigationToDOMContentLoadedEventFired";
 const char kUkmLoadEventName[] = "DocumentTiming.NavigationToLoadEventFired";