AppListController refactoring part 3: Switching over to use AppListShower in Ash.

ash/shell/shell_delegate_impl.cc

Index: ash/shell/shell_delegate_impl.cc
diff --git a/ash/shell/shell_delegate_impl.cc b/ash/shell/shell_delegate_impl.cc
index 45e8acbcf33180ffa96bdf9e38a7639292073aed..0671bf6127a44c63770e1637c717ac388ef29887 100644
--- a/ash/shell/shell_delegate_impl.cc
+++ b/ash/shell/shell_delegate_impl.cc
@@ -5,6 +5,8 @@
 #include "ash/shell/shell_delegate_impl.h"
 
 #include "ash/accessibility_delegate.h"
+#include "ash/app_list/app_list_shower_delegate_factory.h"
+#include "ash/app_list/app_list_view_delegate_factory.h"
 #include "ash/default_accessibility_delegate.h"
 #include "ash/default_user_wallpaper_delegate.h"
 #include "ash/gpu_support_stub.h"
@@ -19,10 +21,12 @@
 #include "ash/system/tray/default_system_tray_delegate.h"
 #include "ash/test/test_keyboard_ui.h"
 #include "ash/wm/window_state.h"
+#include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/user_manager/user_info_impl.h"
 #include "ui/app_list/app_list_view_delegate.h"
+#include "ui/app_list/shower/app_list_shower_impl.h"
 #include "ui/aura/window.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/image/image_skia.h"
@@ -134,9 +138,30 @@ class SessionStateDelegateImpl : public SessionStateDelegate {
   DISALLOW_COPY_AND_ASSIGN(SessionStateDelegateImpl);
 };
 
+class AppListViewDelegateFactoryImpl : public ash::AppListViewDelegateFactory {
+ public:
+  AppListViewDelegateFactoryImpl() {}
+  ~AppListViewDelegateFactoryImpl() override {}
+
+  // app_list::AppListViewDelegateFactory:
+  app_list::AppListViewDelegate* GetDelegate() override {
+    if (!app_list_view_delegate_.get())
+      app_list_view_delegate_.reset(CreateAppListViewDelegate());
+    return app_list_view_delegate_.get();
+  }
+
+ private:
+  std::unique_ptr<app_list::AppListViewDelegate> app_list_view_delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(AppListViewDelegateFactoryImpl);
+};
+
 }  // namespace
 
-ShellDelegateImpl::ShellDelegateImpl() : shelf_delegate_(nullptr) {}
+ShellDelegateImpl::ShellDelegateImpl()
+    : shelf_delegate_(nullptr),
+      app_list_shower_delegate_factory_(new AppListShowerDelegateFactory(
+          base::WrapUnique(new AppListViewDelegateFactoryImpl))) {}
 
 ShellDelegateImpl::~ShellDelegateImpl() {}
 
@@ -191,10 +216,12 @@ void ShellDelegateImpl::RemoveVirtualKeyboardStateObserver(
 
 void ShellDelegateImpl::OpenUrl(const GURL& url) {}
 
-app_list::AppListViewDelegate* ShellDelegateImpl::GetAppListViewDelegate() {
-  if (!app_list_view_delegate_)
-    app_list_view_delegate_.reset(ash::shell::CreateAppListViewDelegate());
-  return app_list_view_delegate_.get();
+app_list::AppListShower* ShellDelegateImpl::GetAppListShower() {
+  if (!app_list_shower_) {
+    app_list_shower_.reset(new app_list::AppListShowerImpl(
+        app_list_shower_delegate_factory_.get()));
+  }
+  return app_list_shower_.get();
 }
 
 ShelfDelegate* ShellDelegateImpl::CreateShelfDelegate(ShelfModel* model) {