Enable surprise me wallpaper for new profiles.

chrome/browser/chromeos/login/wallpaper_manager.h

 // Copyright (c) 2013 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_LOGIN_WALLPAPER_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_WALLPAPER_MANAGER_H_
 
 #include <deque>
 #include <string>
 #include <vector>
@@ skipping 287 matching lines @@
 
   // Called when the wallpaper policy has been cleared for |user_id|.
   void OnPolicyCleared(const std::string& policy, const std::string& user_id);
 
   // Called when the policy-set wallpaper has been fetched.  Initiates decoding
   // of the JPEG |data| with a callback to SetPolicyControlledWallpaper().
   void OnPolicyFetched(const std::string& policy,
                        const std::string& user_id,
                        scoped_ptr<std::string> data);
 
+  // Enable surprise me wallpaper mode.
+  void EnableSurpriseMe();
+
  private:
   friend class TestApi;
   friend class WallpaperManagerBrowserTest;
   friend class WallpaperManagerPolicyTest;
 
   typedef std::map<std::string, gfx::ImageSkia> CustomWallpaperMap;
 
   // Set |wallpaper| controlled by policy.
   void SetPolicyControlledWallpaper(const std::string& user_id,
                                     const UserImage& wallpaper);
@@ skipping 201 matching lines @@
   // All pending will be finally deleted on destroy.
   typedef std::vector<scoped_refptr<PendingWallpaper> > PendingList;
   PendingList loading_;
 
   DISALLOW_COPY_AND_ASSIGN(WallpaperManager);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_WALLPAPER_MANAGER_H_