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

ui/app_list/app_list_constants.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 "ui/app_list/app_list_constants.h"
 
 namespace app_list {
 
 const SkColor kContentsBackgroundColor = SkColorSetRGB(0xFB, 0xFB, 0xFB);
 const SkColor kSearchBoxBackground = SK_ColorWHITE;
@@ skipping 18 matching lines @@
 
 // Color of the folder ink bubble.
 const SkColor kFolderBubbleColor = SkColorSetRGB(0xD7, 0xD7, 0xD7);
 
 // Duration in milliseconds for page transition.
 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;
 const int kPreferredIconDimension = 48;
 
 // Number of the top items in a folder, which are shown inside the folder icon
 // and animated when opening and closing a folder.
 const size_t kNumFolderTopItems = 4;
 
 // Font style for app item labels.
 const ui::ResourceBundle::FontStyle kItemTextFontStyle =
     ui::ResourceBundle::SmallBoldFont;
 
 #if defined(OS_LINUX)
 #if defined(GOOGLE_CHROME_BUILD)
 const char kAppListWMClass[] = "chrome_app_list";
 #else  // CHROMIUM_BUILD
 const char kAppListWMClass[] = "chromium_app_list";
 #endif
 #endif
 
 }  // namespace app_list