[Mac] Include MacViews native app windows in regular builds.

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 8750336e32d83708a1e8c17a1257fdd5bc259187..2304a13452119b7352a15f08e8b48ebd0090c61f 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2406,6 +2406,14 @@ const Experiment kExperiments[] = {
     ENABLE_DISABLE_VALUE_TYPE(switches::kEnableAppInfoDialogMac,
                               switches::kDisableAppInfoDialogMac)
   },
+  {
+    "mac-views-native-app-windows",
+    IDS_FLAGS_MAC_VIEWS_NATIVE_APP_WINDOWS_NAME,
+    IDS_FLAGS_MAC_VIEWS_NATIVE_APP_WINDOWS_DESCRIPTION,
+    kOsMac,
+    ENABLE_DISABLE_VALUE_TYPE(switches::kEnableMacViewsNativeAppWindows,
+                              switches::kDisableMacViewsNativeAppWindows)
+  },
 #endif
   // NOTE: Adding new command-line switches requires adding corresponding
   // entries to enum "LoginCustomFlags" in histograms.xml. See note in