Enable the syncing of extension and app settings by default.

chrome/common/chrome_switches.h

Index: chrome/common/chrome_switches.h
diff --git a/chrome/common/chrome_switches.h b/chrome/common/chrome_switches.h
index e65ff7ca7693c5475fb7319d70ddac0f906fbb1d..3543d7fafc1b3259d66695a62fd2f7194c57eed8 100644
--- a/chrome/common/chrome_switches.h
+++ b/chrome/common/chrome_switches.h
@@ -101,12 +101,14 @@ extern const char kDisableRestoreSessionState[];
 extern const char kDisableShortcutsProvider[];
 extern const char kDisableSSL3[];
 extern const char kDisableSync[];
+extern const char kDisableSyncAppSettings[];
 extern const char kDisableSyncApps[];
 extern const char kDisableSyncAppNotifications[];
 extern const char kDisableSyncAutofill[];
 extern const char kDisableSyncAutofillProfile[];
 extern const char kDisableSyncBookmarks[];
 extern const char kDisableSyncEncryption[];
+extern const char kDisableSyncExtensionSettings[];
 extern const char kDisableSyncExtensions[];
 extern const char kDisableSyncPasswords[];
 extern const char kDisableSyncPreferences[];
@@ -158,9 +160,6 @@ extern const char kEnablePnacl[];
 extern const char kEnableProfiling[];
 extern const char kEnableResourceContentSettings[];
 extern const char kEnableSdch[];
-// TODO(kalman): Add to about:flags when UI for syncing extension settings has
-// been figured out.
-extern const char kEnableSyncExtensionSettings[];
 extern const char kEnableSyncTabs[];
 extern const char kEnableSyncTabsForOtherClients[];
 extern const char kEnableTabGroupsContextMenu[];