Added classes to enable session sync functionality.

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 5a6b770fcee59cca02c83bcb6b8e06af427d67be..2d22fcfaa4e334a35947c366195c88a491fc2dc1 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -243,6 +243,9 @@ const char kDisableSyncPasswords[]          = "disable-sync-passwords";
 // Disable syncing of preferences.
 const char kDisableSyncPreferences[]        = "disable-sync-preferences";
 
+// Disable syncing of sessions.
+const char kDisableSyncSessions[]        = "disable-sync-sessions";
+
 // Disable syncing of themes.
 const char kDisableSyncThemes[]             = "disable-sync-themes";
 
@@ -436,6 +439,9 @@ const char kEnableSyncPasswords[]           = "enable-sync-passwords";
 // Enable syncing browser preferences.
 const char kEnableSyncPreferences[]         = "enable-sync-preferences";
 
+// Enable syncing browser sessions.
+const char kEnableSyncSessions[]         = "enable-sync-sessions";
+
 // Enable syncing browser themes.
 const char kEnableSyncThemes[]              = "enable-sync-themes";