Log base::Features in Launch.FlagsAtStartup

chrome/browser/about_flags.h

Index: chrome/browser/about_flags.h
diff --git a/chrome/browser/about_flags.h b/chrome/browser/about_flags.h
index 35c643132f96fd852f52a7a683742762278e5235..02a5df944d6bf0362959fd7ae5cfe000cef44310 100644
--- a/chrome/browser/about_flags.h
+++ b/chrome/browser/about_flags.h
@@ -91,7 +91,14 @@ base::HistogramBase::Sample GetSwitchUMAId(const std::string& switch_name);
 // a histogram, with an enum value for each flag in |flags|, based on the
 // hash of the flag name.
 void ReportAboutFlagsHistogram(const std::string& uma_histogram_name,
-                               const std::set<std::string>& flags);
+                               const std::set<std::string>& switches,
+                               const std::set<std::string>& features);
+
+void ReportAboutFlagsHistogramSwitches(const std::string& uma_histogram_name,
+                                       const std::set<std::string>& switches);
+
+void ReportAboutFlagsHistogramFeatures(const std::string& uma_histogram_name,
+                                       const std::set<std::string>& features);
 
 namespace testing {