Revert 150726 - Preload default wallpaper.

BUG=139929


Review URL: https://chromiumcodereview.appspot.com/10827154

TBR=bshe@chromium.org
Review URL: https://chromiumcodereview.appspot.com/10854061

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@150740 0039d316-1c4b-4281-b951-d872f2087c98

ash/desktop_background/desktop_background_controller.cc

@@ -151,18 +151,6 @@ void DesktopBackgroundController::OnRootWindowAdded(
   InstallComponent(root_window);
 }
 
-void DesktopBackgroundController::CacheDefaultWallpaper(int index) {
-  DCHECK(index >= 0);
-
-  WallpaperResolution resolution = GetAppropriateResolution();
-  scoped_refptr<WallpaperOperation> wallpaper_op =
-      new WallpaperOperation(index, resolution);
-  base::WorkerPool::PostTask(
-      FROM_HERE,
-      base::Bind(&WallpaperOperation::Run, wallpaper_op),
-      true);
-}
-
 void DesktopBackgroundController::SetDefaultWallpaper(int index,
                                                       bool force_reload) {
   // We should not change background when index is invalid. For instance, at
@@ -181,7 +169,15 @@ void DesktopBackgroundController::SetDefaultWallpaper(int index,
 
   CancelPendingWallpaperOperation();
 
-  WallpaperResolution resolution = GetAppropriateResolution();
+  WallpaperResolution resolution = SMALL;
+  Shell::RootWindowList root_windows = Shell::GetAllRootWindows();
+  for (Shell::RootWindowList::iterator iter = root_windows.begin();
+       iter != root_windows.end(); ++iter) {
+    gfx::Size root_window_size = (*iter)->GetHostSize();
+    if (root_window_size.width() > kSmallWallpaperMaximalWidth ||
+        root_window_size.height() > kSmallWallpaperMaximalHeight)
+      resolution = LARGE;
+  }
 
   wallpaper_op_ = new WallpaperOperation(index, resolution);
   base::WorkerPool::PostTaskAndReply(
@@ -359,17 +355,4 @@ int DesktopBackgroundController::GetBackgroundContainerId(bool locked) {
                   internal::kShellWindowId_DesktopBackgroundContainer;
 }
 
-WallpaperResolution DesktopBackgroundController::GetAppropriateResolution() {
-  WallpaperResolution resolution = SMALL;
-  Shell::RootWindowList root_windows = Shell::GetAllRootWindows();
-  for (Shell::RootWindowList::iterator iter = root_windows.begin();
-       iter != root_windows.end(); ++iter) {
-    gfx::Size root_window_size = (*iter)->GetHostSize();
-    if (root_window_size.width() > kSmallWallpaperMaximalWidth ||
-        root_window_size.height() > kSmallWallpaperMaximalHeight)
-      resolution = LARGE;
-  }
-  return resolution;
-}
-
 }  // namespace ash

ash/desktop_background/desktop_background_controller.h

@@ -76,11 +76,6 @@ class ASH_EXPORT DesktopBackgroundController : public aura::WindowObserver {
   // Initialize root window's background.
   void OnRootWindowAdded(aura::RootWindow* root_window);
 
-  // Loads default wallpaper at |index| asynchronously but does not set the
-  // loaded image to current wallpaper. Resource bundle will cache the loaded
-  // image.
-  void CacheDefaultWallpaper(int index);
-
   // Loads default wallpaper at |index| asynchronously and sets to current
   // wallpaper after loaded. When |force_reload| is true, reload wallpaper
   // for all root windows even if |index| is the same as current wallpaper. It
@@ -150,9 +145,6 @@ class ASH_EXPORT DesktopBackgroundController : public aura::WindowObserver {
   // Returns id for background container for unlocked and locked states.
   int GetBackgroundContainerId(bool locked);
 
-  // Returns the appropriate wallpaper resolution for all root windows.
-  WallpaperResolution GetAppropriateResolution();
-
   // Can change at runtime.
   bool locked_;
 

chrome/browser/chromeos/login/user_manager_impl.cc

@@ -731,6 +731,8 @@ void UserManagerImpl::EnsureUsersLoaded() {
         User* user = CreateUser(email, /* is_ephemeral= */ false);
         users_.push_back(user);
 
+        WallpaperManager::Get()->CacheIfCustomWallpaper(email);
+
         if (prefs_images) {
           // Get account image path.
           // TODO(avayvod): Reading image path as a string is here for

chrome/browser/chromeos/login/wallpaper_manager.cc

@@ -17,7 +17,6 @@
 #include "base/time.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
-#include "chrome/browser/chromeos/login/user.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
@@ -48,8 +47,6 @@ const char kWallpaperDateNodeName[] = "date";
 const int kThumbnailWidth = 128;
 const int kThumbnailHeight = 80;
 
-const int kCacheWallpaperDelayMs = 500;
-
 // Default wallpaper index used in OOBE (first boot).
 // Defined here because Chromium default index differs.
 // Also see ash::WallpaperInfo kDefaultWallpapers in
@@ -86,18 +83,11 @@ WallpaperManager::WallpaperManager()
       current_user_wallpaper_type_(User::UNKNOWN),
       ALLOW_THIS_IN_INITIALIZER_LIST(current_user_wallpaper_index_(
           ash::GetInvalidWallpaperIndex())),
-      should_cache_wallpaper_(false),
       ALLOW_THIS_IN_INITIALIZER_LIST(weak_factory_(this)) {
   RestartTimer();
   registrar_.Add(this,
                  chrome::NOTIFICATION_LOGIN_USER_CHANGED,
                  content::NotificationService::AllSources());
-  registrar_.Add(this,
-                 chrome::NOTIFICATION_LOGIN_WEBUI_VISIBLE,
-                 content::NotificationService::AllSources());
-  registrar_.Add(this,
-                 chrome::NOTIFICATION_WALLPAPER_ANIMATION_FINISHED,
-                 content::NotificationService::AllSources());
 }
 
 // static
@@ -112,6 +102,21 @@ void WallpaperManager::AddObservers() {
   system::TimezoneSettings::GetInstance()->AddObserver(this);
 }
 
+void WallpaperManager::CacheIfCustomWallpaper(const std::string& email) {
+  User::WallpaperType type;
+  int index;
+  base::Time date;
+  GetUserWallpaperProperties(email, &type, &index, &date);
+  if (type == User::CUSTOMIZED) {
+    std::string wallpaper_path = GetWallpaperPathForUser(email, false).value();
+
+    // Uses WeakPtr here to make the request cancelable.
+    wallpaper_loader_->Start(wallpaper_path, 0,
+                             base::Bind(&WallpaperManager::CacheWallpaper,
+                                        weak_factory_.GetWeakPtr(), email));
+  }
+}
+
 void WallpaperManager::EnsureLoggedInUserWallpaperLoaded() {
   User::WallpaperType type;
   int index;
@@ -240,39 +245,10 @@ void WallpaperManager::Observe(int type,
                                const content::NotificationSource& source,
                                const content::NotificationDetails& details) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  switch (type) {
-    case chrome::NOTIFICATION_LOGIN_USER_CHANGED: {
+  if (type == chrome::NOTIFICATION_LOGIN_USER_CHANGED) {
     // Cancel callback for previous cache requests.
     weak_factory_.InvalidateWeakPtrs();
     custom_wallpaper_cache_.clear();
-      break;
-    }
-    case chrome::NOTIFICATION_LOGIN_WEBUI_VISIBLE: {
-      if (!CommandLine::ForCurrentProcess()->
-          HasSwitch(switches::kDisableBootAnimation)) {
-        BrowserThread::PostDelayedTask(
-            BrowserThread::UI, FROM_HERE,
-            base::Bind(&WallpaperManager::CacheAllUsersWallpapers,
-                       weak_factory_.GetWeakPtr()),
-            base::TimeDelta::FromMilliseconds(kCacheWallpaperDelayMs));
-      } else {
-        should_cache_wallpaper_ = true;
-      }
-      break;
-    }
-    case chrome::NOTIFICATION_WALLPAPER_ANIMATION_FINISHED: {
-      if (should_cache_wallpaper_) {
-        BrowserThread::PostDelayedTask(
-            BrowserThread::UI, FROM_HERE,
-            base::Bind(&WallpaperManager::CacheAllUsersWallpapers,
-                       weak_factory_.GetWeakPtr()),
-            base::TimeDelta::FromMilliseconds(kCacheWallpaperDelayMs));
-        should_cache_wallpaper_ = false;
-      }
-      break;
-    }
-    default:
-      NOTREACHED() << "Unexpected notification " << type;
   }
 }
 
@@ -472,37 +448,6 @@ void WallpaperManager::BatchUpdateWallpaper() {
   RestartTimer();
 }
 
-void WallpaperManager::CacheAllUsersWallpapers() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  UserList users = UserManager::Get()->GetUsers();
-
-  UserList::const_iterator it = users.begin();
-  // Skip the wallpaper of first user in the list. It should have been cached.
-  it++;
-  for (; it != users.end(); ++it) {
-    std::string user_email = (*it)->email();
-    CacheUserWallpaper(user_email);
-  }
-}
-
-void WallpaperManager::CacheUserWallpaper(const std::string& email) {
-  User::WallpaperType type;
-  int index;
-  base::Time date;
-  GetUserWallpaperProperties(email, &type, &index, &date);
-  if (type == User::CUSTOMIZED) {
-    std::string wallpaper_path = GetWallpaperPathForUser(email, false).value();
-
-    // Uses WeakPtr here to make the request cancelable.
-    wallpaper_loader_->Start(wallpaper_path, 0,
-                             base::Bind(&WallpaperManager::CacheWallpaper,
-                                        weak_factory_.GetWeakPtr(), email));
-  } else {
-    ash::Shell::GetInstance()->desktop_background_controller()->
-        CacheDefaultWallpaper(index);
-  }
-}
-
 void WallpaperManager::CacheWallpaper(const std::string& email,
                                       const UserImage& wallpaper) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
@@ -538,7 +483,6 @@ void WallpaperManager::FetchWallpaper(const std::string& email,
       base::Bind(&WallpaperManager::CacheThumbnail,
                  base::Unretained(this), email, wallpaper.image()));
 
-  custom_wallpaper_cache_.insert(std::make_pair(email, wallpaper.image()));
   ash::Shell::GetInstance()->desktop_background_controller()->
       SetCustomWallpaper(wallpaper.image(), layout);
 }

chrome/browser/chromeos/login/wallpaper_manager.h

@@ -45,6 +45,9 @@ class WallpaperManager: public system::TimezoneSettings::Observer,
   // added after PowerManagerClient initialized.
   void AddObservers();
 
+  // Caches |email|'s wallpaper to memory if it is custom wallpaper.
+  void CacheIfCustomWallpaper(const std::string& email);
+
   // Loads wallpaper asynchronously if the current wallpaper is not the
   // wallpaper of logged in user.
   void EnsureLoggedInUserWallpaperLoaded();
@@ -131,21 +134,6 @@ class WallpaperManager: public system::TimezoneSettings::Observer,
   // at 0am if chromeos device is on.
   void BatchUpdateWallpaper();
 
-  // Cache all logged in users' wallpapers to memory at login screen. It should
-  // not compete with first wallpaper loading when boot up/initialize login
-  // WebUI page.
-  // There are two ways the first wallpaper might be loaded:
-  // 1. Loaded on boot. Login WebUI waits for it.
-  // 2. When flag --disable-boot-animation is passed. Login WebUI is loaded
-  // right away and in 500ms after. Wallpaper started to load.
-  // For case 2, should_cache_wallpaper_ is used to indicate if we need to
-  // cache wallpapers on wallpaper animation finished. The cache operation
-  // should be only executed once.
-  void CacheAllUsersWallpapers();
-
-  // Caches |email|'s wallpaper to memory.
-  void CacheUserWallpaper(const std::string& email);
-
   // Caches the decoded wallpaper to memory.
   void CacheWallpaper(const std::string& email, const UserImage& wallpaper);
 
@@ -212,8 +200,6 @@ class WallpaperManager: public system::TimezoneSettings::Observer,
   // The last selected user on user pod row.
   std::string last_selected_user_;
 
-  bool should_cache_wallpaper_;
-
   base::WeakPtrFactory<WallpaperManager> weak_factory_;
 
   content::NotificationRegistrar registrar_;