Added constants, strings, protos for app sync.

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 31ee2363efae1a73c648d90a8e26b798663d301f..f75718970d0ad70b2394ae01df2faeac79ffa400 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -213,6 +213,9 @@ const char kDisableSiteSpecificQuirks[]     = "disable-site-specific-quirks";
 // Disable syncing browser data to a Google Account.
 const char kDisableSync[]                   = "disable-sync";
 
+// Disable syncing of apps.
+const char kDisableSyncApps[]               = "disable-sync-apps";
+
 // Disable syncing of autofill.
 const char kDisableSyncAutofill[]           = "disable-sync-autofill";
 
@@ -398,6 +401,9 @@ const char kEnableStatsTable[]              = "enable-stats-table";
 // Enable syncing browser data to a Google Account.
 const char kEnableSync[]                    = "enable-sync";
 
+// Enable syncing browser apps.
+const char kEnableSyncApps[]                = "enable-sync-apps";
+
 // Enable syncing browser autofill.
 const char kEnableSyncAutofill[]            = "enable-sync-autofill";