Sync wallpaper based on sync themes setting

chrome/browser/chromeos/extensions/wallpaper_private_api.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_CHROMEOS_EXTENSIONS_WALLPAPER_PRIVATE_API_H_
 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_WALLPAPER_PRIVATE_API_H_
 
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/chromeos/extensions/wallpaper_function_base.h"
 #include "chrome/common/extensions/api/wallpaper_private.h"
 #include "net/url_request/url_fetcher_delegate.h"
 
 namespace chromeos {
 class UserImage;
 }  // namespace chromeos
 
 // Wallpaper manager strings.
 class WallpaperPrivateGetStringsFunction : public SyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("wallpaperPrivate.getStrings",
                              WALLPAPERPRIVATE_GETSTRINGS)
 
  protected:
   virtual ~WallpaperPrivateGetStringsFunction() {}
 
   // SyncExtensionFunction overrides.
   virtual bool RunSync() override;
 };
 
+// Check if sync themes setting is enabled.
+class WallpaperPrivateGetSyncSettingFunction : public SyncExtensionFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("wallpaperPrivate.getSyncSetting",
+                             WALLPAPERPRIVATE_GETSYNCSETTING)
+
+ protected:
+  virtual ~WallpaperPrivateGetSyncSettingFunction() {}
+
+  // SyncExtensionFunction overrides.
+  virtual bool RunSync() override;
+};
+
 class WallpaperPrivateSetWallpaperIfExistsFunction
     : public WallpaperFunctionBase {
  public:
   DECLARE_EXTENSION_FUNCTION("wallpaperPrivate.setWallpaperIfExists",
                              WALLPAPERPRIVATE_SETWALLPAPERIFEXISTS)
 
   WallpaperPrivateSetWallpaperIfExistsFunction();
 
  protected:
   virtual ~WallpaperPrivateSetWallpaperIfExistsFunction();
@@ skipping 239 matching lines @@
   // Sends the list of files to extension api caller. If no files or no
   // directory, sends empty list.
   void OnComplete(const std::vector<std::string>& file_list);
 
   // Sequence token associated with wallpaper operations. Shared with
   // WallpaperManager.
   base::SequencedWorkerPool::SequenceToken sequence_token_;
 };
 
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_WALLPAPER_PRIVATE_API_H_