Mac: Give packaged app windows their own window cycle list.

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 6091a6f1a24fede1806c08cd93c7b333fce3458f..749c2b1acf3d095fdc4bee8a4ea6755c3708fa84 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1991,6 +1991,12 @@ const Experiment kExperiments[] = {
      kOsMac,
      ENABLE_DISABLE_VALUE_TYPE(switches::kEnableMacViewsNativeAppWindows,
                                switches::kDisableMacViewsNativeAppWindows)},
+    {"app-window-cycling",
+     IDS_FLAGS_APP_WINDOW_CYCLING_NAME,
+     IDS_FLAGS_APP_WINDOW_CYCLING_DESCRIPTION,
+     kOsMac,
+     ENABLE_DISABLE_VALUE_TYPE(switches::kEnableAppWindowCycling,
+                               switches::kDisableAppWindowCycling)},
 #endif
     // NOTE: Adding new command-line switches requires adding corresponding
     // entries to enum "LoginCustomFlags" in histograms.xml. See note in