Use low resolution wallpaper for small screens.

chrome/browser/chromeos/login/wallpaper_manager.cc

 // 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.
 
 #include "chrome/browser/chromeos/login/wallpaper_manager.h"
 
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/shell.h"
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 188 matching lines @@
     WizardController::SetZeroDelays();
 
   if (!user_manager->IsUserLoggedIn()) {
     if (!CommandLine::ForCurrentProcess()->HasSwitch(
             switches::kDisableNewOobe)) {
       if (!WizardController::IsDeviceRegistered() &&
           !WizardController::IsZeroDelayEnabled()) {
         // TODO(nkostylev): Add switch to disable wallpaper transition on OOBE.
         // Should be used on test images so that they are not slowed down.
         ash::Shell::GetInstance()->desktop_background_controller()->
-            SetDefaultWallpaper(kDefaultOOBEWallpaperIndex);
+            SetDefaultWallpaper(kDefaultOOBEWallpaperIndex, false);
       } else {
         bool show_users = true;
         bool result = CrosSettings::Get()->GetBoolean(
             kAccountsPrefShowUserNamesOnSignIn, &show_users);
         DCHECK(result) << "Unable to fetch setting "
                        << kAccountsPrefShowUserNamesOnSignIn;
         if (!show_users) {
           ash::Shell::GetInstance()->desktop_background_controller()->
-              SetDefaultWallpaper(ash::GetSolidColorIndex());
+              SetDefaultWallpaper(ash::GetSolidColorIndex(), false);
         }
       }
     }
     return;
   }
   SetUserWallpaper(user_manager->GetLoggedInUser().email());
 }
 
 void WallpaperManager::Observe(int type,
                                const content::NotificationSource& source,
@@ skipping 71 matching lines @@
     current_user_wallpaper_index_ = ash::GetDefaultWallpaperIndex();
   SaveUserWallpaperProperties(username,
                               current_user_wallpaper_type_,
                               current_user_wallpaper_index_);
 
   // Some browser tests do not have shell instance. And it is not necessary to
   // create a wallpaper for these tests. Add HasInstance check to prevent tests
   // crash and speed up the tests by avoid loading wallpaper.
   if (ash::Shell::HasInstance()) {
     ash::Shell::GetInstance()->desktop_background_controller()->
-        SetDefaultWallpaper(current_user_wallpaper_index_);
+        SetDefaultWallpaper(current_user_wallpaper_index_, false);
   }
 }
 
 void WallpaperManager::SaveUserWallpaperInfo(const std::string& username,
                                              const std::string& file_name,
                                              ash::WallpaperLayout layout,
                                              User::WallpaperType type) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   // Ephemeral users can not save data to local state. We just cache the index
@@ skipping 38 matching lines @@
       // wallpaper layout. See function SaveWallpaperToLocalState().
       ash::WallpaperLayout layout = static_cast<ash::WallpaperLayout>(index);
       ash::Shell::GetInstance()->desktop_background_controller()->
           SetCustomWallpaper(custom_wallpaper, layout);
     } else {
       FetchCustomWallpaper(email);
     }
     return;
   }
   ash::Shell::GetInstance()->desktop_background_controller()->
-      SetDefaultWallpaper(index);
+      SetDefaultWallpaper(index, false);
   SetLastSelectedUser(email);
 }
 
 void WallpaperManager::SetWallpaperFromImageSkia(
     const gfx::ImageSkia& wallpaper,
     ash::WallpaperLayout layout) {
   ash::Shell::GetInstance()->desktop_background_controller()->
       SetCustomWallpaper(wallpaper, layout);
 }
 
 void WallpaperManager::OnUserDeselected() {
   if (!UserManager::Get()->IsUserLoggedIn()) {
     // This will set default login wallpaper (#fefefe).
     ash::Shell::GetInstance()->desktop_background_controller()->
-        SetDefaultWallpaper(ash::GetSolidColorIndex());
+        SetDefaultWallpaper(ash::GetSolidColorIndex(), false);
   }
 }
 
 void WallpaperManager::OnUserSelected(const std::string& email) {
   SetUserWallpaper(email);
 }
 
 // WallpaperManager, private: --------------------------------------------------
 
 WallpaperManager::~WallpaperManager() {
@@ skipping 183 matching lines @@
 
 void WallpaperManager::SystemResumed() {
   BatchUpdateWallpaper();
 }
 
 void WallpaperManager::TimezoneChanged(const icu::TimeZone& timezone) {
   RestartTimer();
 }
 
 }  // chromeos