Implement user selected wallpaper feature.

chrome/browser/chromeos/login/user.h

Index: chrome/browser/chromeos/login/user.h
diff --git a/chrome/browser/chromeos/login/user.h b/chrome/browser/chromeos/login/user.h
index 5115d8d2dae0effa961b22000118fc1d46974cad..348d5589cc79eea3887bc33c64c282c78726bec2 100644
--- a/chrome/browser/chromeos/login/user.h
+++ b/chrome/browser/chromeos/login/user.h
@@ -65,6 +65,9 @@ class User {
   const SkBitmap& image() const { return image_; }
   int image_index() const { return image_index_; }
 
+  // The thumbnail of user custom wallpaper.
+  const SkBitmap& wallpaper_thumb() const { return wallpaper_thumb_; }
+
   // True if user image is a stub (while real image is being loaded from file).
   bool image_is_stub() const { return image_is_stub_; }
 
@@ -92,6 +95,9 @@ class User {
   // one of |kExternalImageIndex| or |kProfileImageIndex|.
   void SetStubImage(int image_index);
 
+  // Set thumbnail of user custom wallpaper.
+  void SetWallpaperThumbnail(const SkBitmap& wallpaper_thumb);
+
   void set_oauth_token_status(OAuthTokenStatus status) {
     oauth_token_status_ = status;
   }
@@ -105,6 +111,7 @@ class User {
   std::string display_email_;
   SkBitmap image_;
   OAuthTokenStatus oauth_token_status_;
+  SkBitmap wallpaper_thumb_;
 
   // Either index of a default image for the user, |kExternalImageIndex| or
   // |kProfileImageIndex|.