Add enable flag for pointer events in about://flags

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 3d38898180ee462b2824c876f5605ac65605d8f4..ec57a52cb8b86c9059ca375c1762ffddfc692f7d 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2123,6 +2123,11 @@ const FeatureEntry kFeatureEntries[] = {
       IDS_FLAGS_ENABLE_WEBFONTS_INTERVENTION_DESCRIPTION,
       kOsAll,
       FEATURE_VALUE_TYPE(features::kWebFontsIntervention)},
+    {"enable-pointer-events",  // FLAGS:RECORD_UMA
+      IDS_FLAGS_EXPERIMENTAL_POINTER_EVENT_NAME,
+      IDS_FLAGS_EXPERIMENTAL_POINTER_EVENT_DESCRIPTION,
+      kOsAll,
+      FEATURE_VALUE_TYPE(features::kPointerEvents)},
     // 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.