[cros] Encode user images when set from WebUI (regression fix).

chrome/browser/chromeos/login/user.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_LOGIN_USER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 48 matching lines @@
   // Returns the human name to display for this user.
   string16 GetDisplayName() const;
 
   // Returns the account name part of the email. Use the display form of the
   // email if available and use_display_name == true. Otherwise use canonical.
   std::string GetAccountName(bool use_display_email) const;
 
   // The image for this user.
   const gfx::ImageSkia& image() const { return user_image_.image(); }
 
-  bool has_default_image() const {
-    return image_index_ >= 0 && image_index_ < kDefaultImagesCount;
-  }
+  // Whether the user has a default image.
+  bool HasDefaultImage() const;
 
   int image_index() const { return image_index_; }
   bool has_raw_image() const { return user_image_.has_raw_image(); }
   // Returns raw representation of static user image.
   const UserImage::RawImage& raw_image() const {
     return user_image_.raw_image();
   }
   bool has_animated_image() const { return user_image_.has_animated_image(); }
   // Returns raw representation of animated user image.
   const UserImage::RawImage& animated_image() const {
@@ skipping 72 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(User);
 };
 
 // List of known users.
 typedef std::vector<User*> UserList;
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USER_H_