Sync wallpaper based on sync themes setting

chrome/browser/chromeos/extensions/wallpaper_private_api.cc

Index: chrome/browser/chromeos/extensions/wallpaper_private_api.cc
diff --git a/chrome/browser/chromeos/extensions/wallpaper_private_api.cc b/chrome/browser/chromeos/extensions/wallpaper_private_api.cc
index 85270aead73d2ab43d0e2fa4c2469f5839dceac0..1c9d20182f8f88a32a7b24451499f41af8859d6d 100644
--- a/chrome/browser/chromeos/extensions/wallpaper_private_api.cc
+++ b/chrome/browser/chromeos/extensions/wallpaper_private_api.cc
@@ -24,6 +24,8 @@
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/sync/profile_sync_service.h"
+#include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/grit/generated_resources.h"
@@ -292,6 +294,17 @@ bool WallpaperPrivateGetStringsFunction::RunSync() {
   return true;
 }
 
+bool WallpaperPrivateGetSyncSettingFunction::RunSync() {
+  Profile* profile =  Profile::FromBrowserContext(browser_context());
+  ProfileSyncService* sync =
+      ProfileSyncServiceFactory::GetInstance()->GetForProfile(profile);
+  base::DictionaryValue* dict = new base::DictionaryValue();
+  SetResult(dict);
+  dict->SetBoolean("syncThemes",
+                   sync->GetActiveDataTypes().Has(syncer::THEMES));
+  return true;
+}
+
 WallpaperPrivateSetWallpaperIfExistsFunction::
     WallpaperPrivateSetWallpaperIfExistsFunction() {}