Remove single-window-metro-mode code paths for the app launcher and apps.

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 c7139bec2f5f0803f926ad399c19a1b0c1e16388..bafb03a1d6d4409b0e64c2f6d33fd56f3ce820e2 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -2511,10 +2511,6 @@ const char kRLZDisabled[] = "rlz.disabled";
 // app launcher.
 const char kAppListProfile[] = "app_list.profile";
 
-// Whether to show the app list on a browser relaunch. Used when switching out
-// of metro mode after a user gesture requests showing the app list.
-const char kRestartWithAppList[] = "app_list.show_on_relaunch";
-
 // The number of times the app launcher was launched since last ping and
 // the time of the last ping.
 const char kAppListLaunchCount[] = "app_list.launch_count";