arc-app-launcher: Minimal support for ARC app launcher.

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 94952ba486bbfae7ba6b3ee64849cfae17939aa4..b990d83f928d03fa2b1d2be7a3e023cc3bb60021 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -12,6 +12,10 @@ namespace prefs {
 // *************** PROFILE PREFS ***************
 // These are attached to the user profile
 
+#if defined(OS_CHROMEOS)
+// A preference to keep list of ARC apps and its state.
+const char kArcApps[] = "arc.apps";
+#endif
 
 // A bool pref that keeps whether the child status for this profile was already
 // successfully checked via ChildAccountService.