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 7e325e8f708b970161f4ddaa0e24ee28af1c908f..04d1af5aa7c09b90404fa0dccceb458840428c09 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(android) applications and its state.
+const char kArcApps[] = "arcapps";
+#endif
 
 // A bool pref that keeps whether the child status for this profile was already
 // successfully checked via ChildAccountService.