Sync the launch type pref for apps.

chrome/browser/extensions/launch_util.h

Index: chrome/browser/extensions/launch_util.h
diff --git a/chrome/browser/extensions/launch_util.h b/chrome/browser/extensions/launch_util.h
index 0cdfb72fa484d4244b6c6822d1e399f4233055cd..8afa202a196508ad884b89180e2dfc782ebda51f 100644
--- a/chrome/browser/extensions/launch_util.h
+++ b/chrome/browser/extensions/launch_util.h
@@ -9,6 +9,8 @@
 
 #include "chrome/common/extensions/extension_constants.h"
 
+class ExtensionService;
+
 namespace extensions {
 
 class Extension;
@@ -22,10 +24,13 @@ LaunchType GetLaunchType(const ExtensionPrefs* prefs,
                          const Extension* extension);
 
 // Sets an extension's launch type preference.
-void SetLaunchType(ExtensionPrefs* prefs,
+void SetLaunchType(ExtensionService* prefs,
                    const std::string& extension_id,
                    LaunchType launch_type);
 
+bool HasPreferredLaunchType(const ExtensionPrefs* prefs,
+                            const Extension* extension);
+
 // Finds the right launch container based on the launch type.
 // If |extension|'s prefs do not have a launch type set, then the default
 // value from GetLaunchType() is used to choose the launch container.