Animate the app list search box shadow.

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(0xF5, 0xF5, 0xF5);
 const SkColor kSearchBoxBackground = SK_ColorWHITE;
@@ skipping 32 matching lines @@
 const SkColor kFolderTitleColor = SkColorSetRGB(0x33, 0x33, 0x33);
 const SkColor kFolderTitleHintTextColor = SkColorSetRGB(0xA0, 0xA0, 0xA0);
 // Color of the folder ink bubble.
 const SkColor kFolderBubbleColor = SK_ColorWHITE;
 // Color of the folder bubble shadow.
 const SkColor kFolderShadowColor = SkColorSetRGB(0xBF, 0xBF, 0xBF);
 const float kFolderBubbleRadius = 23;
 const float kFolderShadowRadius = 23.5;
 const float kFolderShadowOffsetY = 1;
 
-const int kCardShadowBlur = 4;
-const int kCardShadowYOffset = 1;
-const SkColor kCardShadowColor = SkColorSetARGB(0x4C, 0, 0, 0);
 const SkColor kCardBackgroundColor = SK_ColorWHITE;
 
 // 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 fading in the target page when opening
 // or closing a folder, and the duration for the top folder icon animation
@@ skipping 53 matching lines @@
     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
 
+gfx::ShadowValue GetShadowForZHeight(int z_height) {
+  if (z_height <= 0)
+    return gfx::ShadowValue();
+
+  switch (z_height) {
+    case 1:
+      return gfx::ShadowValue(gfx::Point(0, 1), 2,
+                              SkColorSetARGB(0x4C, 0, 0, 0));
+    case 2:
+      return gfx::ShadowValue(gfx::Point(0, 2), 4,
+                              SkColorSetARGB(0x33, 0, 0, 0));
+    default:
+      return gfx::ShadowValue(gfx::Point(0, 8), 12,
+                              SkColorSetARGB(0x3F, 0, 0, 0));
+  }
+}
+
 }  // namespace app_list