Implements a display scale tray setting behind a chrome switch

chrome/browser/flag_descriptions.cc

Index: chrome/browser/flag_descriptions.cc
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 71e11e2db6077b00ec0712d856766771b4595da7..4672249dcae6c19cbbf0b730f9950d26e561bc52 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -3121,4 +3121,14 @@ const char kLocationHardReloadDescription[] =
     "Enable an experimental change for Location.reload() to trigger a "
     "hard-reload.";
 
+#if defined(OS_CHROMEOS) && defined(USE_ASH)
+// Name of the flag that enables display scale tray settings.
+const char kAshEnableScaleSettingsTrayName[] = "Display scale tray setting";
+
+// Description of the flag that enables display scale tray settings.
+const char kAshEnableScaleSettingsTrayDescription[] =
+    "Enables a setting in the system tray to change the device scale factor of "
+    "the device to any fractional value.";
+#endif  // defined(OS_CHROMEOS) && defined(USE_ASH)
+
 }  // namespace flag_descriptions