AppListController refactoring part 2: Ash's AppListShowerDelegate imlementation.

ash/BUILD.gn

Index: ash/BUILD.gn
diff --git a/ash/BUILD.gn b/ash/BUILD.gn
index 9c7cdd0826c511ab22870989220eae653ae3ff7e..0f017cf612faee1d90a15559e9fec8e68ba66573 100644
--- a/ash/BUILD.gn
+++ b/ash/BUILD.gn
@@ -40,7 +40,7 @@ component("ash") {
     "//skia",
     "//third_party/icu",
     "//ui/accessibility",
-    "//ui/app_list",
+    "//ui/app_list/shower",
     "//ui/aura",
     "//ui/base",
     "//ui/base:ui_data_pack",
@@ -200,8 +200,8 @@ source_set("test_support") {
     "//skia",
     "//testing/gtest",
     "//ui/accessibility",
-    "//ui/app_list",
     "//ui/app_list:test_support",
+    "//ui/app_list/shower",
     "//ui/aura",
     "//ui/aura:test_support",
     "//ui/base:test_support",
@@ -286,7 +286,7 @@ static_library("ash_shell_lib") {
     "//net",
     "//skia",
     "//third_party/icu",
-    "//ui/app_list",
+    "//ui/app_list/shower",
     "//ui/aura",
     "//ui/base",
     "//ui/base/ime",
@@ -356,7 +356,7 @@ test("ash_unittests") {
     "//testing/gtest",
     "//third_party/icu",
     "//ui/accessibility",
-    "//ui/app_list",
+    "//ui/app_list/shower",
     "//ui/aura",
     "//ui/aura:test_support",
     "//ui/base",