Implement user selected wallpaper feature.

chrome/browser/chromeos/login/user_manager_impl.h

Index: chrome/browser/chromeos/login/user_manager_impl.h
diff --git a/chrome/browser/chromeos/login/user_manager_impl.h b/chrome/browser/chromeos/login/user_manager_impl.h
index bb6523fcb172b9bd6d65f8612e72f27658505c80..34db78f291f0c72bf3afe80315a526785345ae1e 100644
--- a/chrome/browser/chromeos/login/user_manager_impl.h
+++ b/chrome/browser/chromeos/login/user_manager_impl.h
@@ -73,8 +73,13 @@ class UserManagerImpl : public UserManager,
                                          int image_index) OVERRIDE;
   virtual void SaveUserImage(const std::string& username,
                              const SkBitmap& image) OVERRIDE;
+  virtual void SetLoggedInUserCustomWallpaperLayout(
+      ash::WallpaperLayout layout) OVERRIDE;
   virtual void SaveUserImageFromFile(const std::string& username,
                                      const FilePath& path) OVERRIDE;
+  virtual void SaveUserWallpaperFromFile(const std::string& username,
+                                         const FilePath& path,
+                                         ash::WallpaperLayout layout) OVERRIDE;
   virtual void SaveUserImageFromProfileImage(
       const std::string& username) OVERRIDE;
   virtual void DownloadProfileImage(const std::string& reason) OVERRIDE;
@@ -105,6 +110,10 @@ class UserManagerImpl : public UserManager,
   // Returns image filepath for the given user.
   FilePath GetImagePathForUser(const std::string& username);
 
+  // Returns wallpaper/thumbnail filepath for the given user.
+  FilePath GetWallpaperPathForUser(const std::string& username,
+                                   bool is_thumbnail);
+
  private:
   friend class UserManagerImplWrapper;
   friend class UserManagerTest;
@@ -136,6 +145,9 @@ class UserManagerImpl : public UserManager,
   // Notifies on new user session.
   void NotifyOnLogin();
 
+  // Notifies the custom wallpaper thumbnail has ready.
+  void NotifyThumbnailUpdated();
+
   // Reads user's oauth token status from local state preferences.
   User::OAuthTokenStatus LoadUserOAuthStatus(const std::string& username) const;
 
@@ -176,6 +188,27 @@ class UserManagerImpl : public UserManager,
                              int image_index,
                              const SkBitmap& image);
 
+  // Saves wallpaper to file, post task to generate thumbnail and updates local
+  // state preferences.
+  void SaveUserWallpaperInternal(const std::string& username,
+                                 ash::WallpaperLayout layout,
+                                 User::WallpaperType type,
+                                 const SkBitmap& image);
+
+  // Asynchronous load custom wallpaper thumbnail.

[flackr, 2012/05/04 19:06:17]

Loads custom wallpaper thumbnail asynchronously.

[bshe, 2012/05/08 22:22:18]

Done.

+  void LoadCustomWallpaperThumbnail(const std::string& email,
+                                    ash::WallpaperLayout layout,
+                                    const SkBitmap& wallpaper);
+
+  // Cache the loaded wallpaper to the given user.

[flackr, 2012/05/04 19:06:17]

s/Cache/Caches
s/to/for

[bshe, 2012/05/08 22:22:18]

Done.

+  void OnCustomWallpaperThumbnailLoaded(const std::string& email,
+                                        const SkBitmap& wallpaper);
+
+  // Generate a 128x80 thumbnail and save it local file system.

[flackr, 2012/05/04 19:06:17]

s/Generate/Generates
s/save/saves

[bshe, 2012/05/08 22:22:18]

Done.

+  void GenerateUserWallpaperThumbnail(const std::string& username,
+                                      User::WallpaperType type,
+                                      const SkBitmap& wallpaper);
+
   // Saves image to file with specified path and sends LOGIN_USER_IMAGE_CHANGED
   // notification. Runs on FILE thread. Posts task for saving image info to
   // Local State on UI thread.
@@ -184,6 +217,14 @@ class UserManagerImpl : public UserManager,
                        const FilePath& image_path,
                        int image_index);
 
+  // Saves wallpaper to file with specified path. Runs on FILE thread. Posts
+  // task for saving wallpaper info to Local State on UI thread.
+  void SaveWallpaperToFile(const std::string& username,
+                           const SkBitmap& wallpaper,
+                           const FilePath& wallpaper_path,
+                           ash::WallpaperLayout layout,
+                           User::WallpaperType type);
+
   // Stores path to the image and its index in local state. Runs on UI thread.
   // If |is_async| is true, it has been posted from the FILE thread after
   // saving the image.
@@ -192,6 +233,16 @@ class UserManagerImpl : public UserManager,
                              int image_index,
                              bool is_async);
 
+  // Stores layout and type preference in local state. Runs on UI thread.
+  void SaveWallpaperToLocalState(const std::string& username,
+                                 const std::string& wallpaper_path,
+                                 ash::WallpaperLayout layout,
+                                 User::WallpaperType type);
+
+  // Save |image| to the specified |image_path|. Runs on FILE thread.

[flackr, 2012/05/04 19:06:17]

s/Save/Saves

[bshe, 2012/05/08 22:22:18]

Done.

+  bool SaveBitmapToFile(const SkBitmap& image,
+                        const FilePath& image_path);
+
   // Initializes |downloaded_profile_picture_| with the picture of the logged-in
   // user.
   void InitDownloadedProfileImage();
@@ -253,13 +304,8 @@ class UserManagerImpl : public UserManager,
 
   User::WallpaperType current_user_wallpaper_type_;
 
-  //std::string current_user_wallpaper_path_;
-
   int current_user_wallpaper_index_;
 
-  // Cache current user selected wallpaper layout in memory.
-  //ash::ImageLayout current_user_wallpaper_layout_;
-
   // The key store for the current user has been loaded. This flag is needed to
   // ensure that the key store will not be loaded twice in the policy recovery
   // "safe-mode".