Animate the app list search box shadow.

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 a17864e3802ca40db159684da47351c9af7fbea9..53a140145d7a442e076272def3bb9875dcbc289b 100644
--- a/ui/app_list/app_list_constants.cc
+++ b/ui/app_list/app_list_constants.cc
@@ -50,9 +50,6 @@ 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.
@@ -126,4 +123,21 @@ 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