Hide Night Light behind a flag

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 ee3cb30a3f303fc98d471c70e01ba73b421c1ab3..7c40dafcf084769adaa4df4c15c04481703c6a5f 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -1067,6 +1067,11 @@ const char kEnableNavigationTracingDescription[] =
     "flag. The trace may include personally identifiable information (PII) "
     "such as the titles and URLs of websites you visit.";
 
+const char kEnableNightLightName[] = "Enable Night Light";
+const char kEnableNightLightDescription[] =
+    "Enable the Night Light feature to control the color temperature of the "
+    "screen.";
+
 const char kEnablePictureInPictureName[] = "Enable picture in picture.";
 
 const char kEnablePictureInPictureDescription[] =