Restart Chrome if per session flags have been specified on ChromeOS.

chrome/browser/about_flags.h

Index: chrome/browser/about_flags.h
diff --git a/chrome/browser/about_flags.h b/chrome/browser/about_flags.h
index 304fec16d458edc8623cf502ad79aae578f60d6c..1517d15aa4c991e07e5d6ef6ad03d0b7789b97ea 100644
--- a/chrome/browser/about_flags.h
+++ b/chrome/browser/about_flags.h
@@ -107,6 +107,11 @@ struct Experiment {
 // commandline flags belonging to the active experiments to |command_line|.
 void ConvertFlagsToSwitches(PrefService* prefs, CommandLine* command_line);
 
+// Compares a set of switches of the two provided command line objects and
+// returns true if they are the same and false otherwise.
+bool CompareSwitchesToCurrentCommandLine(const CommandLine& new_cmdline,
+                                         const CommandLine& active_cmdline);
+
 // Differentiate between generic flags available on a per session base and flags
 // that influence the whole machine and can be said by the admin only. This flag
 // is relevant for ChromeOS for now only and dictates whether entries marked