If customization includes default wallpaper, download and apply it.

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 <numeric>
 #include <vector>
 
+#include "ash/ash_switches.h"
+#include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/shell.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_registry_simple.h"
@@ skipping 19 matching lines @@
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_service.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/codec/jpeg_codec.h"
 #include "ui/gfx/image/image_skia_operations.h"
 #include "ui/gfx/skia_util.h"
 
 using content::BrowserThread;
 
+namespace chromeos {
+
 namespace {
 
 // The amount of delay before starts to move custom wallpapers to the new place.
 const int kMoveCustomWallpaperDelaySeconds = 30;
 
 // Default quality for encoding wallpaper.
 const int kDefaultEncodingQuality = 90;
 
 // A dictionary pref that maps usernames to file paths to their wallpapers.
 // Deprecated. Will remove this const char after done migration.
@@ skipping 46 matching lines @@
                                   const std::string& user_id,
                                   const std::string& user_id_hash) {
   base::FilePath base_path = GetCustomWallpaperDir(sub_dir);
   base::FilePath to_path = base_path.Append(user_id_hash);
   base::FilePath from_path = base_path.Append(user_id);
   if (base::PathExists(from_path))
     return base::Move(from_path, to_path);
   return false;
 }
 
+void CheckCustomizedWallpaperFilesExist(
+    const base::FilePath& downloaded_file,
+    const WallpaperManager::CustomizedWallpaperRescaledFiles* rescaled_files,
+    WallpaperManager::CustomizedWallpaperFilesExist* exist) {
+  DCHECK(BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
+  DCHECK(rescaled_files);
+  DCHECK(exist);
+  exist->downloaded = base::PathExists(downloaded_file);
+  exist->rescaled_small = base::PathExists(rescaled_files->path_rescaled_small);
+  exist->rescaled_large = base::PathExists(rescaled_files->path_rescaled_large);
+}
+
 }  // namespace
 
-namespace chromeos {
-
 const char kWallpaperSequenceTokenName[] = "wallpaper-sequence";
 
 const char kSmallWallpaperSuffix[] = "_small";
 const char kLargeWallpaperSuffix[] = "_large";
 
 const char kSmallWallpaperSubDir[] = "small";
 const char kLargeWallpaperSubDir[] = "large";
 const char kOriginalWallpaperSubDir[] = "original";
 const char kThumbnailWallpaperSubDir[] = "thumb";
 
@@ skipping 72 matching lines @@
 
   WallpaperManager* manager = WallpaperManager::Get();
   if (manager->pending_inactive_ == this)
     manager->pending_inactive_ = NULL;
 
   started_load_at_ = base::Time::Now();
 
   if (default_) {
     manager->DoSetDefaultWallpaper(user_id_, on_finish_.Pass());
   } else if (!user_wallpaper_.isNull()) {
-    ash::Shell::GetInstance()->
-        desktop_background_controller()->
-            SetCustomWallpaper(user_wallpaper_, info_.layout);
+    ash::Shell::GetInstance()->desktop_background_controller()->SetWallpaper(
+        user_wallpaper_, info_.layout);
   } else if (!wallpaper_path_.empty()) {
     manager->task_runner_->PostTask(
         FROM_HERE,
         base::Bind(&WallpaperManager::GetCustomWallpaperInternal,
                    base::Unretained(manager),
                    user_id_,
                    info_,
                    wallpaper_path_,
                    true /* update wallpaper */,
                    base::Passed(on_finish_.Pass())));
@@ skipping 35 matching lines @@
        i != manager->loading_.end();
        ++i)
     if (i->get() == this) {
       manager->loading_.erase(i);
       break;
     }
 }
 
 // WallpaperManager, public: ---------------------------------------------------
 
+WallpaperManager::CustomizedWallpaperRescaledFiles::
+    CustomizedWallpaperRescaledFiles(const base::FilePath& path_rescaled_small,
+                                     const base::FilePath& path_rescaled_large)
+    : path_rescaled_small(path_rescaled_small),
+      path_rescaled_large(path_rescaled_large) {
+}
+
+WallpaperManager::CustomizedWallpaperFilesExist::CustomizedWallpaperFilesExist()
+    : downloaded(false), rescaled_small(false), rescaled_large(false) {
+}
+
+bool WallpaperManager::CustomizedWallpaperFilesExist::AllRescaledExist() const {
+  return rescaled_small && rescaled_large;
+}
+
 // TestApi. For testing purpose
 WallpaperManager::TestApi::TestApi(WallpaperManager* wallpaper_manager)
     : wallpaper_manager_(wallpaper_manager) {
 }
 
 WallpaperManager::TestApi::~TestApi() {
 }
 
 base::FilePath WallpaperManager::TestApi::current_wallpaper_path() {
   return wallpaper_manager_->current_wallpaper_path_;
@@ skipping 20 matching lines @@
     g_wallpaper_manager = new WallpaperManager();
   return g_wallpaper_manager;
 }
 
 WallpaperManager::WallpaperManager()
     : loaded_wallpapers_(0),
       command_line_for_testing_(NULL),
       should_cache_wallpaper_(false),
       weak_factory_(this),
       pending_inactive_(NULL) {
+  SetDefaultWallpaperPathFromCommandLine(
+      base::CommandLine::ForCurrentProcess());
   registrar_.Add(this,
                  chrome::NOTIFICATION_LOGIN_USER_CHANGED,
                  content::NotificationService::AllSources());
   registrar_.Add(this,
                  chrome::NOTIFICATION_LOGIN_OR_LOCK_WEBUI_VISIBLE,
                  content::NotificationService::AllSources());
   registrar_.Add(this,
                  chrome::NOTIFICATION_WALLPAPER_ANIMATION_FINISHED,
                  content::NotificationService::AllSources());
   sequence_token_ = BrowserThread::GetBlockingPool()->
@@ skipping 106 matching lines @@
   }
 
   return GetUserWallpaperInfo(UserManager::Get()->GetLoggedInUser()->email(),
                               info);
 }
 
 void WallpaperManager::InitializeWallpaper() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   UserManager* user_manager = UserManager::Get();
 
+  // Apply device customization.
+  if (ShouldUseCustomizedDefaultWallpaper()) {
+    SetDefaultWallpaperPath(
+        GetCustomizedWallpaperDefaultRescaledFileName(kSmallWallpaperSuffix),
+        scoped_ptr<gfx::ImageSkia>().Pass(),
+        GetCustomizedWallpaperDefaultRescaledFileName(kLargeWallpaperSuffix),
+        scoped_ptr<gfx::ImageSkia>().Pass());
+  }
+
   CommandLine* command_line = GetComandLine();
   if (command_line->HasSwitch(chromeos::switches::kGuestSession)) {
     // Guest wallpaper should be initialized when guest login.
     // Note: This maybe called before login. So IsLoggedInAsGuest can not be
     // used here to determine if current user is guest.
     return;
   }
 
   if (command_line->HasSwitch(::switches::kTestType))
     WizardController::SetZeroDelays();
@@ skipping 68 matching lines @@
       prefs::kUsersWallpaperInfo);
   prefs_wallpapers_info_update->RemoveWithoutPathExpansion(user_id, NULL);
   DeleteUserWallpapers(user_id, info.file);
 }
 
 bool WallpaperManager::ResizeWallpaper(
     const UserImage& wallpaper,
     ash::WallpaperLayout layout,
     int preferred_width,
     int preferred_height,
-    scoped_refptr<base::RefCountedBytes>* output) const {
+    scoped_refptr<base::RefCountedBytes>* output,
+    gfx::ImageSkia* output_skia) const {
   DCHECK(BrowserThread::GetBlockingPool()->
       IsRunningSequenceOnCurrentThread(sequence_token_));
   int width = wallpaper.image().width();
   int height = wallpaper.image().height();
   int resized_width;
   int resized_height;
   *output = new base::RefCountedBytes();
 
   if (layout == ash::WALLPAPER_LAYOUT_CENTER_CROPPED) {
     // Do not resize custom wallpaper if it is smaller than preferred size.
@@ skipping 26 matching lines @@
 
   SkBitmap image = *(resized_image.bitmap());
   SkAutoLockPixels lock_input(image);
   gfx::JPEGCodec::Encode(
       reinterpret_cast<unsigned char*>(image.getAddr32(0, 0)),
       gfx::JPEGCodec::FORMAT_SkBitmap,
       image.width(),
       image.height(),
       image.width() * image.bytesPerPixel(),
       kDefaultEncodingQuality, &(*output)->data());
+
+  if (output_skia) {
+    resized_image.MakeThreadSafe();
+    *output_skia = resized_image;
+  }
+
   return true;
 }
 
-void WallpaperManager::ResizeAndSaveWallpaper(const UserImage& wallpaper,
+bool WallpaperManager::ResizeAndSaveWallpaper(const UserImage& wallpaper,
                                               const base::FilePath& path,
                                               ash::WallpaperLayout layout,
                                               int preferred_width,
-                                              int preferred_height) const {
+                                              int preferred_height,
+                                              gfx::ImageSkia* result) const {
   if (layout == ash::WALLPAPER_LAYOUT_CENTER) {
     // TODO(bshe): Generates cropped custom wallpaper for CENTER layout.
     if (base::PathExists(path))
       base::DeleteFile(path, false);
-    return;
+    return false;
   }
   scoped_refptr<base::RefCountedBytes> data;
-  if (ResizeWallpaper(wallpaper, layout, preferred_width, preferred_height,
-                      &data)) {
-    SaveWallpaperInternal(path,
-                          reinterpret_cast<const char*>(data->front()),
-                          data->size());
+  if (ResizeWallpaper(wallpaper,
+                      layout,
+                      preferred_width,
+                      preferred_height,
+                      &data,
+                      result)) {
+    return SaveWallpaperInternal(
+        path, reinterpret_cast<const char*>(data->front()), data->size());
   }
+  return false;
 }
 
 bool WallpaperManager::IsPolicyControlled(const std::string& user_id) const {
   chromeos::WallpaperInfo info;
   if (!GetUserWallpaperInfo(user_id, &info))
     return false;
   return info.type == chromeos::User::POLICY;
 }
 
 void WallpaperManager::OnPolicySet(const std::string& policy,
@@ skipping 121 matching lines @@
 }
 
 void WallpaperManager::SetDefaultWallpaperNow(const std::string& user_id) {
   GetPendingWallpaper(user_id, false)->ResetSetDefaultWallpaper();
 }
 
 void WallpaperManager::SetDefaultWallpaperDelayed(const std::string& user_id) {
   GetPendingWallpaper(user_id, true)->ResetSetDefaultWallpaper();
 }
 
+void WallpaperManager::OnDefaultWallpaperDecoded(
+    const base::FilePath& path,
+    scoped_ptr<gfx::ImageSkia>* result,
+    MovableOnDestroyCallbackHolder on_finish,
+    const UserImage& wallpaper) {
+  result->reset(new gfx::ImageSkia);
+  (**result) = wallpaper.image();
+  ash::Shell::GetInstance()->desktop_background_controller()->SetWallpaper(
+      wallpaper.image(), ash::WALLPAPER_LAYOUT_STRETCH);
+}
+
+void WallpaperManager::StartLoadAndSetDefaultWallpaper(
+    const base::FilePath& path,
+    scoped_ptr<gfx::ImageSkia>* result,
+    MovableOnDestroyCallbackHolder on_finish) {
+  wallpaper_loader_->Start(
+      path.value(),
+      0,  // Do not crop.
+      base::Bind(&WallpaperManager::OnDefaultWallpaperDecoded,
+                 base::Unretained(this),
+                 path,
+                 base::Unretained(result),
+                 base::Passed(on_finish.Pass())));
+}
+
 void WallpaperManager::DoSetDefaultWallpaper(
     const std::string& user_id,
     MovableOnDestroyCallbackHolder on_finish) {
   // There is no visible background in kiosk mode.
   if (UserManager::Get()->IsLoggedInAsKioskApp())
     return;
   current_wallpaper_path_.clear();
   wallpaper_cache_.erase(user_id);
   // Some browser tests do not have a shell instance. As no wallpaper is needed
   // in these tests anyway, avoid loading one, preventing crashes and speeding
   // up the tests.
   if (!ash::Shell::HasInstance())
     return;
-  if (ash::Shell::GetInstance()->desktop_background_controller()->
-          SetDefaultWallpaper(UserManager::Get()->IsLoggedInAsGuest()))
-    loaded_wallpapers_++;
+
+  const bool is_guest = UserManager::Get()->IsLoggedInAsGuest();
+
+  gfx::ImageSkia image;
+
+  ash::WallpaperResolution resolution = ash::Shell::GetInstance()
+                                            ->desktop_background_controller()
+                                            ->GetAppropriateResolution();
+  const bool use_small = (resolution == ash::WALLPAPER_RESOLUTION_SMALL);
+
+  if (is_guest) {
+    if (use_small) {
+      if (guest_default_small_wallpaper_image_.get() == NULL) {
+        StartLoadAndSetDefaultWallpaper(guest_default_small_wallpaper_file_,
+                                        &guest_default_small_wallpaper_image_,
+                                        on_finish.Pass());
+        return;
+      }
+      image = *guest_default_small_wallpaper_image_;
+    } else {
+      if (guest_default_large_wallpaper_image_.get() == NULL) {
+        StartLoadAndSetDefaultWallpaper(guest_default_large_wallpaper_file_,
+                                        &guest_default_large_wallpaper_image_,
+                                        on_finish.Pass());
+        return;
+      }
+      image = *guest_default_large_wallpaper_image_;
+    }
+  } else {
+    // not guest
+    if (use_small) {
+      if (default_small_wallpaper_image_.get() == NULL) {
+        StartLoadAndSetDefaultWallpaper(default_small_wallpaper_file_,
+                                        &default_small_wallpaper_image_,
+                                        on_finish.Pass());
+        return;
+      }
+      image = *default_small_wallpaper_image_;
+    } else {
+      if (default_large_wallpaper_image_.get() == NULL) {
+        StartLoadAndSetDefaultWallpaper(default_large_wallpaper_file_,
+                                        &default_large_wallpaper_image_,
+                                        on_finish.Pass());
+        return;
+      }
+      image = *default_large_wallpaper_image_;
+    }
+  }
+  ash::Shell::GetInstance()->desktop_background_controller()->SetWallpaper(
+      image, ash::WALLPAPER_LAYOUT_STRETCH);
 }
 
 void WallpaperManager::InitInitialUserWallpaper(const std::string& user_id,
                                                 bool is_persistent) {
   current_user_wallpaper_info_.file = "";
   current_user_wallpaper_info_.layout = ash::WALLPAPER_LAYOUT_CENTER_CROPPED;
   current_user_wallpaper_info_.type = User::DEFAULT;
   current_user_wallpaper_info_.date = base::Time::Now().LocalMidnight();
 
   WallpaperInfo info = current_user_wallpaper_info_;
@@ skipping 305 matching lines @@
   dir = GetCustomWallpaperDir(kOriginalWallpaperSubDir);
   dir = dir.Append(user_id_hash);
   if (!base::PathExists(dir))
     base::CreateDirectory(dir);
   dir = GetCustomWallpaperDir(kThumbnailWallpaperSubDir);
   dir = dir.Append(user_id_hash);
   if (!base::PathExists(dir))
     base::CreateDirectory(dir);
 }
 
+void WallpaperManager::set_command_line_for_testing(
+    base::CommandLine* command_line) {
+  command_line_for_testing_ = command_line;
+  SetDefaultWallpaperPathFromCommandLine(command_line);
+}
+
 CommandLine* WallpaperManager::GetComandLine() {
   CommandLine* command_line = command_line_for_testing_ ?
       command_line_for_testing_ : CommandLine::ForCurrentProcess();
   return command_line;
 }
 
 void WallpaperManager::InitializeRegisteredDeviceWallpaper() {
   if (UserManager::Get()->IsUserLoggedIn())
     return;
 
@@ skipping 231 matching lines @@
     return;
   }
 
   // Only cache the user wallpaper at login screen and for multi profile users.
   if (!UserManager::Get()->IsUserLoggedIn() ||
       UserManager::IsMultipleProfilesAllowed()) {
     wallpaper_cache_[user_id] = wallpaper.image();
   }
 
   if (update_wallpaper) {
-    ash::Shell::GetInstance()->desktop_background_controller()->
-        SetCustomWallpaper(wallpaper.image(), layout);
+    ash::Shell::GetInstance()->desktop_background_controller()->SetWallpaper(
+        wallpaper.image(), layout);
   }
 }
 
 void WallpaperManager::ProcessCustomWallpaper(
     const std::string& user_id_hash,
     bool persistent,
     const WallpaperInfo& info,
     scoped_ptr<gfx::ImageSkia> image,
     const UserImage::RawImage& raw_image) {
   DCHECK(BrowserThread::GetBlockingPool()->
@@ skipping 14 matching lines @@
   EnsureCustomWallpaperDirectories(user_id_hash);
   std::string file_name = original_path.BaseName().value();
   base::FilePath small_wallpaper_path =
       GetCustomWallpaperPath(kSmallWallpaperSubDir, user_id_hash, file_name);
   base::FilePath large_wallpaper_path =
       GetCustomWallpaperPath(kLargeWallpaperSubDir, user_id_hash, file_name);
 
   // 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,
+  ResizeAndSaveWallpaper(wallpaper,
+                         original_path,
                          ash::WALLPAPER_LAYOUT_STRETCH,
                          wallpaper.image().width(),
-                         wallpaper.image().height());
+                         wallpaper.image().height(),
+                         NULL);
   DeleteAllExcept(original_path);
 
-  ResizeAndSaveWallpaper(wallpaper, small_wallpaper_path, layout,
+  ResizeAndSaveWallpaper(wallpaper,
+                         small_wallpaper_path,
+                         layout,
                          ash::kSmallWallpaperMaxWidth,
-                         ash::kSmallWallpaperMaxHeight);
+                         ash::kSmallWallpaperMaxHeight,
+                         NULL);
   DeleteAllExcept(small_wallpaper_path);
-  ResizeAndSaveWallpaper(wallpaper, large_wallpaper_path, layout,
+  ResizeAndSaveWallpaper(wallpaper,
+                         large_wallpaper_path,
+                         layout,
                          ash::kLargeWallpaperMaxWidth,
-                         ash::kLargeWallpaperMaxHeight);
+                         ash::kLargeWallpaperMaxHeight,
+                         NULL);
   DeleteAllExcept(large_wallpaper_path);
 }
 
 void WallpaperManager::RecordUma(User::WallpaperType type, int index) const {
   UMA_HISTOGRAM_ENUMERATION("Ash.Wallpaper.Type", type,
                             User::WALLPAPER_TYPE_COUNT);
 }
 
-void WallpaperManager::SaveWallpaperInternal(const base::FilePath& path,
+bool WallpaperManager::SaveWallpaperInternal(const base::FilePath& path,
                                              const char* data,
                                              int size) const {
   int written_bytes = base::WriteFile(path, data, size);
-  DCHECK(written_bytes == size);
+  return written_bytes == size;
 }
 
 void WallpaperManager::StartLoad(const std::string& user_id,
                                  const WallpaperInfo& info,
                                  bool update_wallpaper,
                                  const base::FilePath& wallpaper_path,
                                  MovableOnDestroyCallbackHolder on_finish) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   TRACE_EVENT_ASYNC_BEGIN0("ui", "LoadAndDecodeWallpaper", this);
 
@@ skipping 52 matching lines @@
   if (!pending_inactive_) {
     loading_.push_back(new WallpaperManager::PendingWallpaper(
         (delayed ? GetWallpaperLoadDelay()
                  : base::TimeDelta::FromMilliseconds(0)),
         user_id));
     pending_inactive_ = loading_.back();
   }
   return pending_inactive_;
 }
 
+// static
+base::FilePath WallpaperManager::GetCustomizedWallpaperDefaultRescaledFileName(
+    const char* suffix) {
+  const base::FilePath default_downloaded_file_name =
+      ServicesCustomizationDocument::GetCustomizedWallpaperDownloadedFileName();
+  const base::FilePath default_cache_dir =
+      ServicesCustomizationDocument::GetCustomizedWallpaperCacheDir();
+  if (default_downloaded_file_name.empty() || default_cache_dir.empty())
+    return base::FilePath();
+  return default_cache_dir.Append(
+      default_downloaded_file_name.BaseName().value() + suffix);
+}
+
+void WallpaperManager::SetCustomizedDefaultWallpaper(
+    const GURL& wallpaper_url,
+    const base::FilePath& downloaded_file,
+    const base::FilePath& resized_directory) {
+  // Should fail if this ever happens in tests.
+  DCHECK(wallpaper_url.is_valid() || wallpaper_url.is_empty());
+  if (!wallpaper_url.is_valid()) {
+    if (!wallpaper_url.is_empty()) {
+      LOG(WARNING) << "Invalid Customized Wallpaper URL.";
+    }
+    return;
+  }
+  std::string downloaded_file_name = downloaded_file.BaseName().value();
+  scoped_ptr<CustomizedWallpaperRescaledFiles> rescaled_files(
+      new CustomizedWallpaperRescaledFiles(
+          resized_directory.Append(downloaded_file_name +
+                                   kSmallWallpaperSuffix),
+          resized_directory.Append(downloaded_file_name +
+                                   kLargeWallpaperSuffix)));
+  scoped_ptr<CustomizedWallpaperFilesExist> exist(
+      new CustomizedWallpaperFilesExist);
+
+  base::Closure check_file_exists =
+      base::Bind(&CheckCustomizedWallpaperFilesExist,
+                 downloaded_file,
+                 base::Unretained(rescaled_files.get()),
+                 base::Unretained(exist.get()));
+  base::Closure on_checked_closure =
+      base::Bind(&WallpaperManager::SetCustomizedDefaultWallpaperAfterCheck,
+                 weak_factory_.GetWeakPtr(),
+                 wallpaper_url,
+                 downloaded_file,
+                 base::Passed(rescaled_files.Pass()),
+                 base::Passed(exist.Pass()));
+  if (!BrowserThread::PostBlockingPoolTaskAndReply(
+          FROM_HERE, check_file_exists, on_checked_closure)) {
+    LOG(WARNING) << "Failed to start check CheckCustomizedWallpaperFilesExist.";
+  }
+}
+
+void WallpaperManager::ResizeCustomizedDefaultWallpaper(
+    scoped_ptr<gfx::ImageSkia> image,
+    const UserImage::RawImage& raw_image,
+    const CustomizedWallpaperRescaledFiles* rescaled_files,
+    bool* success,
+    gfx::ImageSkia* small_wallpaper_image,
+    gfx::ImageSkia* large_wallpaper_image) {
+  DCHECK(BrowserThread::GetBlockingPool()->IsRunningSequenceOnCurrentThread(
+      sequence_token_));
+  UserImage wallpaper(*image.get(), raw_image);
+
+  *success = true;
+
+  *success &= ResizeAndSaveWallpaper(wallpaper,
+                                     rescaled_files->path_rescaled_small,
+                                     ash::WALLPAPER_LAYOUT_STRETCH,
+                                     ash::kSmallWallpaperMaxWidth,
+                                     ash::kSmallWallpaperMaxHeight,
+                                     small_wallpaper_image);
+
+  *success &= ResizeAndSaveWallpaper(wallpaper,
+                                     rescaled_files->path_rescaled_large,
+                                     ash::WALLPAPER_LAYOUT_STRETCH,
+                                     ash::kLargeWallpaperMaxWidth,
+                                     ash::kLargeWallpaperMaxHeight,
+                                     large_wallpaper_image);
+}
+
+void WallpaperManager::OnCustomizedDefaultWallpaperResized(
+    const GURL& wallpaper_url,
+    scoped_ptr<CustomizedWallpaperRescaledFiles> rescaled_files,
+    scoped_ptr<bool> success,
+    scoped_ptr<gfx::ImageSkia> small_wallpaper_image,
+    scoped_ptr<gfx::ImageSkia> large_wallpaper_image) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK(rescaled_files.get());
+  DCHECK(success.get());
+  if (!*success) {
+    LOG(WARNING) << "Failed to save Resized Customized Default Wallpaper";
+    return;
+  }
+  PrefService* pref_service = g_browser_process->local_state();
+  pref_service->SetString(prefs::kCustomizationDefaultWallpaperURL,
+                          wallpaper_url.spec());
+  SetDefaultWallpaperPath(rescaled_files->path_rescaled_small,
+                          small_wallpaper_image.Pass(),
+                          rescaled_files->path_rescaled_large,
+                          large_wallpaper_image.Pass());
+  VLOG(1) << "Customized Default Wallpaper applied.";
+}
+
+void WallpaperManager::OnCustomizedDefaultWallpaperDecoded(
+    const GURL& wallpaper_url,
+    scoped_ptr<CustomizedWallpaperRescaledFiles> rescaled_files,
+    const UserImage& wallpaper) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  // If decoded wallpaper is empty, we have probably failed to decode the file.
+  if (wallpaper.image().isNull()) {
+    LOG(WARNING) << "Failed to decode customized wallpaper.";
+    return;
+  }
+
+  wallpaper.image().EnsureRepsForSupportedScales();
+  scoped_ptr<gfx::ImageSkia> deep_copy(wallpaper.image().DeepCopy());
+
+  scoped_ptr<bool> success(new bool(false));
+  scoped_ptr<gfx::ImageSkia> small_wallpaper_image(new gfx::ImageSkia);
+  scoped_ptr<gfx::ImageSkia> large_wallpaper_image(new gfx::ImageSkia);
+
+  // TODO(bshe): This may break if RawImage becomes RefCountedMemory.
+  base::Closure resize_closure =
+      base::Bind(&WallpaperManager::ResizeCustomizedDefaultWallpaper,
+                 base::Unretained(this),
+                 base::Passed(&deep_copy),
+                 wallpaper.raw_image(),
+                 base::Unretained(rescaled_files.get()),
+                 base::Unretained(success.get()),
+                 base::Unretained(small_wallpaper_image.get()),
+                 base::Unretained(large_wallpaper_image.get()));
+  base::Closure on_resized_closure =
+      base::Bind(&WallpaperManager::OnCustomizedDefaultWallpaperResized,
+                 weak_factory_.GetWeakPtr(),
+                 wallpaper_url,
+                 base::Passed(rescaled_files.Pass()),
+                 base::Passed(success.Pass()),
+                 base::Passed(small_wallpaper_image.Pass()),
+                 base::Passed(large_wallpaper_image.Pass()));
+
+  if (!task_runner_->PostTaskAndReply(
+          FROM_HERE, resize_closure, on_resized_closure)) {
+    LOG(WARNING) << "Failed to start Customized Wallpaper resize.";
+  }
+}
+
+void WallpaperManager::SetCustomizedDefaultWallpaperAfterCheck(
+    const GURL& wallpaper_url,
+    const base::FilePath& downloaded_file,
+    scoped_ptr<CustomizedWallpaperRescaledFiles> rescaled_files,
+    scoped_ptr<CustomizedWallpaperFilesExist> exist) {
+  PrefService* pref_service = g_browser_process->local_state();
+
+  std::string current_url =
+      pref_service->GetString(prefs::kCustomizationDefaultWallpaperURL);
+  if (current_url != wallpaper_url.spec() || !exist->AllRescaledExist()) {
+    DCHECK(exist->downloaded);
+    // Need rescale
+    wallpaper_loader_->Start(
+        downloaded_file.value(),
+        0,  // Do not crop.
+        base::Bind(&WallpaperManager::OnCustomizedDefaultWallpaperDecoded,
+                   weak_factory_.GetWeakPtr(),
+                   wallpaper_url,
+                   base::Passed(rescaled_files.Pass())));
+  } else {
+    SetDefaultWallpaperPath(rescaled_files->path_rescaled_small,
+                            scoped_ptr<gfx::ImageSkia>().Pass(),
+                            rescaled_files->path_rescaled_large,
+                            scoped_ptr<gfx::ImageSkia>().Pass());
+  }
+}
+
+// static
+bool WallpaperManager::ShouldUseCustomizedDefaultWallpaper() {
+  PrefService* pref_service = g_browser_process->local_state();
+
+  return !(pref_service->FindPreference(
+                             prefs::kCustomizationDefaultWallpaperURL)
+               ->IsDefaultValue());
+}
+
+void WallpaperManager::SetDefaultWallpaperPathFromCommandLine(
+    base::CommandLine* command_line) {
+  default_small_wallpaper_file_ = command_line->GetSwitchValuePath(
+      ash::switches::kAshDefaultWallpaperSmall);
+  default_large_wallpaper_file_ = command_line->GetSwitchValuePath(
+      ash::switches::kAshDefaultWallpaperLarge);
+  guest_default_small_wallpaper_file_ =
+      command_line->GetSwitchValuePath(ash::switches::kAshGuestWallpaperSmall);
+  guest_default_large_wallpaper_file_ =
+      command_line->GetSwitchValuePath(ash::switches::kAshGuestWallpaperLarge);
+}
+
+void WallpaperManager::SetDefaultWallpaperPath(
+    const base::FilePath& default_small_wallpaper_file,
+    scoped_ptr<gfx::ImageSkia> small_wallpaper_image,
+    const base::FilePath& default_large_wallpaper_file,
+    scoped_ptr<gfx::ImageSkia> large_wallpaper_image) {
+  default_small_wallpaper_file_ = default_small_wallpaper_file;
+  default_large_wallpaper_file_ = default_large_wallpaper_file;
+  default_small_wallpaper_image_.swap(small_wallpaper_image);
+  default_large_wallpaper_image_.swap(large_wallpaper_image);
+
+  ash::DesktopBackgroundController* dbc =
+      ash::Shell::GetInstance()->desktop_background_controller();
+  if ((small_wallpaper_image.get() &&
+       dbc->WallpaperIsAlreadyLoaded(*small_wallpaper_image)) ||
+      (large_wallpaper_image.get() &&
+       dbc->WallpaperIsAlreadyLoaded(*large_wallpaper_image))) {
+    DoSetDefaultWallpaper(std::string(),
+                          MovableOnDestroyCallbackHolder().Pass());
+  }
+}
+
 }  // namespace chromeos