Add policy for fullscreen mode; disallow fullscreen in public sessions

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index 1376a4c2a489e6408d98220202a6a9553571a2e0..28a871fe4433dde43f23d4ed3b7f5b1ed962386a 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -1305,6 +1305,11 @@ const char kExtensionsPref[] = "extensions.settings";
 // loaded.
 const char kExtensionsLastChromeVersion[] = "extensions.last_chrome_version";
 
+// Boolean pref that determines whether the user can enter fullscreen mode.
+// Disabling fullscreen mode also makes kiosk mode unavailable on desktop
+// platforms.
+extern const char kFullscreenAllowed[] = "fullscreen.allowed";
+
 // *************** LOCAL STATE ***************
 // These are attached to the machine/installation