Add an experimental flag to change location.reload to take a hard-reload

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 0569fd034e73cf549d6d593d33e62cbb89278a9a..e554c144e8291eeabccb91e3df49f583c24e9f22 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2721,9 +2721,13 @@ const FeatureEntry kFeatureEntries[] = {
      FEATURE_VALUE_TYPE(omnibox::kEnableClipboardProvider)},
 #endif
 
+    {"enable-location-hard-reload", flag_descriptions::kLocationHardReloadName,
+     flag_descriptions::kLocationHardReloadDescription, kOsAll,
+     FEATURE_VALUE_TYPE(features::kLocationHardReload)},
+
     // NOTE: Adding new command-line switches requires adding corresponding
-    // entries to enum "LoginCustomFlags" in histograms.xml. See note in
-    // histograms.xml and don't forget to run AboutFlagsHistogramTest unit test.
+    // entries to enum "LoginCustomFlags" in histograms/enums.xml. See note in
+    // enums.xml and don't forget to run AboutFlagsHistogramTest unit test.
 };
 
 class FlagsStateSingleton {