Fix for flickering of images on login screen....

chrome/browser/chromeos/login/user_controller.h

 // Copyright (c) 2010 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_CONTROLLER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USER_CONTROLLER_H_
 
 #include "base/string16.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/chromeos/wm_ipc.h"
@@ skipping 78 matching lines @@
   // Invoked when the user wants to login. Forwards the call to the delegate.
   void Login();
 
   views::WidgetGtk* CreateControlsWindow(int index, int* height);
   views::WidgetGtk* CreateImageWindow(int index);
   views::WidgetGtk* CreateBorderWindow(int index,
                                        int total_user_count,
                                        int controls_height);
   views::WidgetGtk* CreateLabelWindow(int index, WmIpcWindowType type);
 
-  // Sets specified image with desired size on the image window.
-  // Does not repaint the window so SchedulePaint is to be called explicitly
-  // when needed.
-  void SetImage(const SkBitmap& image, int desired_width, int desired_height);
+  // Sets specified image on the image window. If image's size is less than
+  // 75% of window size, image size is preserved to avoid blur. Otherwise,
+  // the image is resized to fit window size precisely. Image view repaints
+  // itself.
+  void SetImage(const SkBitmap& image);
 
   // Sets the enabled state of the password field to |enable|.
   void SetPasswordEnabled(bool enable);
 
   // Is this the guest user?
   const bool is_guest_;
 
   // If is_guest_ is false, this is the user being shown.
   UserManager::User user_;
 
@@ skipping 16 matching lines @@
   views::ImageView* image_view_;
 
   NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(UserController);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USER_CONTROLLER_H_