Enable immersive fullscreen for non-browser windows by default

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 95a260879c458837bf40f4f5a76c31c8810f6f2a..ef981f5e01b11e5fbfb79cbb9cfc471724e7b477 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1024,11 +1024,13 @@ const Experiment kExperiments[] = {
     SINGLE_VALUE_TYPE(ash::switches::kAshDisableDockedWindows)
   },
   {
-    "ash-enable-immersive-fullscreen-all-windows",
+    "ash-enable-immersive-fullscreen-all-windows2",
     IDS_FLAGS_IMMERSIVE_FULLSCREEN_FOR_ALL_WINDOWS_NAME,
     IDS_FLAGS_IMMERSIVE_FULLSCREEN_FOR_ALL_WINDOWS_DESCRIPTION,
     kOsCrOS,
-    SINGLE_VALUE_TYPE(ash::switches::kAshEnableImmersiveFullscreenForAllWindows)
+    ENABLE_DISABLE_VALUE_TYPE(
+        ash::switches::kAshEnableImmersiveFullscreenForAllWindows,
+        ash::switches::kAshEnableImmersiveFullscreenForBrowserOnly)
   },
 #endif
   {