Delete user image when user is removed.

chrome/browser/chromeos/login/user_manager.h

Index: chrome/browser/chromeos/login/user_manager.h
diff --git a/chrome/browser/chromeos/login/user_manager.h b/chrome/browser/chromeos/login/user_manager.h
index 8168eaa9fca3d663fddc9089ba8c1e739f287b07..01766d0fc58c286ecbd84f77df4e619fd82ca0a7 100644
--- a/chrome/browser/chromeos/login/user_manager.h
+++ b/chrome/browser/chromeos/login/user_manager.h
@@ -17,6 +17,7 @@
 #include "chrome/common/notification_registrar.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
+class FilePath;
 class PrefService;
 
 namespace chromeos {
@@ -83,7 +84,7 @@ class UserManager : public UserImageLoader::Delegate,
 
   // Saves image to file and saves image path in local state preferences.
   void SaveUserImage(const std::string& username,
-                             const SkBitmap& image);
+                     const SkBitmap& image);
 
   // Sets one of the default images to the specified user and saves this
   // setting in local state.
@@ -110,6 +111,9 @@ class UserManager : public UserImageLoader::Delegate,
   UserManager();
   virtual ~UserManager();
 
+  // Returns image filepath for the given user.
+  FilePath GetImagePathForUser(const std::string& username);
+
  private:
   // Notifies on new user session.
   void NotifyOnLogin();