Fix logging of Launch.FlagsAtStartup histogram.

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index bdd12c64d47f30cfee2c71f1bf86c462cb9f925d..d0c74f66fbb0edb7fce13ab2fd390c35a253d672 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2184,8 +2184,10 @@ void ResetAllFlags(flags_ui::FlagsStorage* flags_storage) {
 }
 
 void RecordUMAStatistics(flags_ui::FlagsStorage* flags_storage) {
-  std::set<std::string> flags = flags_storage->GetFlags();
-  ReportAboutFlagsHistogram("Launch.FlagsAtStartup", flags);
+  std::set<std::string> switches;
+  FlagsStateSingleton::GetFlagsState()->GetSwitchesFromFlags(flags_storage,
+                                                             &switches);
+  ReportAboutFlagsHistogram("Launch.FlagsAtStartup", switches);
 }
 
 base::HistogramBase::Sample GetSwitchUMAId(const std::string& switch_name) {