Add an outdated upgrade bubble view.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 8018b3f4c034e0ffdbb7fa559338332879685a65..d088e8bf69ee57393e7421a8c3bc602ff144708c 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1197,6 +1197,12 @@ const char kSilentLaunch[]                  = "silent-launch";
 // Simulates an update being available.
 const char kSimulateUpgrade[]               = "simulate-upgrade";
 
+// Simulates a critical update being available.
+const char kSimulateCriticalUpdate[]        = "simulate-critical-update";
+
+// Simulates that current version is outdated.
+const char kSimulateOutdated[]               = "simulate-outdated";
+
 // Replaces the buffered data source for <audio> and <video> with a simplified
 // resource loader that downloads the entire resource into memory.