Use the new animation tween type for app list folder animation.

ui/app_list/app_list_constants.cc

Index: ui/app_list/app_list_constants.cc
diff --git a/ui/app_list/app_list_constants.cc b/ui/app_list/app_list_constants.cc
index c770460e3e745ede1928e8d71e3f0d644dbb726c..43f140d9dd07539a8e6a3bc25a566dd852badb65 100644
--- a/ui/app_list/app_list_constants.cc
+++ b/ui/app_list/app_list_constants.cc
@@ -36,14 +36,23 @@ const int kPageTransitionDurationInMs = 180;
 // Duration in milliseconds for over scroll page transition.
 const int kOverscrollPageTransitionDurationMs = 50;
 
-// Duration in milliseconds for the target page transition when opening or
-// closing a folder.
-const int kFolderTransitionInDurationMs = 200;
+// Duration in milliseconds for fading in the target page when opening
+// or closing a folder, and the duration for the top folder icon animation
+// for flying in or out the folder.
+const int kFolderTransitionInDurationMs = 400;
 
-// Duration in milliseconds for fading out the old page when opening or
-// closing a folder.
+// Duration in milliseconds for fading out the old page when opening or closing
+// a folder.
 const int kFolderTransitionOutDurationMs = 30;
 
+// Animation curve used for fading in the target page when opening or closing
+// a folder.
+const gfx::Tween::Type kFolderFadeInTweenType = gfx::Tween::EASE_IN_2;
+
+// Animation curve used for fading out the target page when opening or closing
+// a folder.
+const gfx::Tween::Type kFolderFadeOutTweenType = gfx::Tween::EASE_IN_3;
+
 // Preferred number of columns and rows in apps grid.
 const int kPreferredCols = 4;
 const int kPreferredRows = 4;