Support png wallpapers

chrome/browser/chromeos/login/wallpaper_manager.cc

 // Copyright (c) 2013 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.
 
 #include "chrome/browser/chromeos/login/wallpaper_manager.h"
 
 #include <vector>
 
 #include "ash/shell.h"
 #include "base/command_line.h"
@@ skipping 1043 matching lines @@
   DCHECK(BrowserThread::GetBlockingPool()->
       IsRunningSequenceOnCurrentThread(sequence_token_));
   EnsureCustomWallpaperDirectories(email);
   std::string file_name = original_path.BaseName().value();
   base::FilePath small_wallpaper_path =
       GetCustomWallpaperPath(kSmallWallpaperSubDir, email, file_name);
   base::FilePath large_wallpaper_path =
       GetCustomWallpaperPath(kLargeWallpaperSubDir, email, file_name);
 
   std::vector<unsigned char> image_data = wallpaper.raw_image();
-  // Saves the original file in case that resized wallpaper is not generated
-  // (i.e. chrome shutdown before resized wallpaper is saved).
-  SaveWallpaperInternal(original_path,
-                        reinterpret_cast<char*>(&*image_data.begin()),
-                        image_data.size());
+  // Re-encode orginal file to jpeg format and saves the result in case that
+  // resized wallpaper is not generated (i.e. chrome shutdown before resized
+  // wallpaper is saved).
+  ResizeAndSaveWallpaper(wallpaper, original_path,
+                         ash::WALLPAPER_LAYOUT_STRETCH,
+                         wallpaper.image().width(),
+                         wallpaper.image().height());
   DeleteAllExcept(original_path);
 
   ResizeAndSaveWallpaper(wallpaper, small_wallpaper_path, layout,
                          ash::kSmallWallpaperMaxWidth,
                          ash::kSmallWallpaperMaxHeight);
   DeleteAllExcept(small_wallpaper_path);
   ResizeAndSaveWallpaper(wallpaper, large_wallpaper_path, layout,
                          ash::kLargeWallpaperMaxWidth,
                          ash::kLargeWallpaperMaxHeight);
   DeleteAllExcept(large_wallpaper_path);
@@ skipping 28 matching lines @@
 }
 
 void WallpaperManager::SystemResumed(const base::TimeDelta& sleep_duration) {
   BatchUpdateWallpaper();
 }
 
 void WallpaperManager::TimezoneChanged(const icu::TimeZone& timezone) {
   RestartTimer();
 }
 
-}  // chromeos
+}  // namespace chromeos