Add fade in animation for guest session and logged in user session

BUG=154859


Review URL: https://chromiumcodereview.appspot.com/12771012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@189037 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 15 insertions, 7 deletions

diff --git a/ash/desktop_background/desktop_background_view.cc b/ash/desktop_background/desktop_background_view.cc
index 0675bc9..1ae7378 100644
--- a/ash/desktop_background/desktop_background_view.cc
+++ b/ash/desktop_background/desktop_background_view.cc
@@ -12,6 +12,7 @@
 #include "ash/desktop_background/user_wallpaper_delegate.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
+#include "ash/shell_delegate.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/property_util.h"
 #include "ash/wm/window_animations.h"
@@ -194,17 +195,24 @@ views::Widget* CreateDesktopBackground(aura::RootWindow* root_window,
   int animation_type = wallpaper_delegate->GetAnimationType();
   views::corewm::SetWindowVisibilityAnimationType(
       desktop_widget->GetNativeView(), animation_type);
-  // Disable animation when creating the first widget. Otherwise, wallpaper
-  // will animate from a white screen. Note that boot animation is different.
-  // It animates from a white background.
-  if (animation_type == views::corewm::WINDOW_VISIBILITY_ANIMATION_TYPE_FADE &&
-      root_window->GetProperty(kAnimatingDesktopController) == NULL) {
+
+  // Enable wallpaper transition for the following cases:
+  // 1. Initial(OOBE) wallpaper animation.
+  // 2. Wallpaper fades in from a non empty background.
+  // 3. From an empty background, chrome transit to a logged in user session.
+  // 4. From an empty background, guest user logged in.
+  if (wallpaper_delegate->ShouldShowInitialAnimation() ||
+      root_window->GetProperty(kAnimatingDesktopController) ||
+      Shell::GetInstance()->delegate()->IsGuestSession() ||
+      Shell::GetInstance()->delegate()->IsUserLoggedIn()) {
     views::corewm::SetWindowVisibilityAnimationTransition(
-        desktop_widget->GetNativeView(), views::corewm::ANIMATE_NONE);
+        desktop_widget->GetNativeView(), views::corewm::ANIMATE_SHOW);
   } else {
+    // Disable animation if transition to login screen from an empty background.
     views::corewm::SetWindowVisibilityAnimationTransition(
-        desktop_widget->GetNativeView(), views::corewm::ANIMATE_SHOW);
+        desktop_widget->GetNativeView(), views::corewm::ANIMATE_NONE);
   }
+
   desktop_widget->SetBounds(params.parent->bounds());
   ui::ScopedLayerAnimationSettings settings(
       desktop_widget->GetNativeView()->layer()->GetAnimator());