Use mojo app list interfaces for mash and classic ash.

chrome/browser/ui/ash/app_list/app_list_service_ash.h

Index: chrome/browser/ui/ash/app_list/app_list_service_ash.h
diff --git a/chrome/browser/ui/ash/app_list/app_list_service_ash.h b/chrome/browser/ui/ash/app_list/app_list_service_ash.h
index b3f3763e61dbde6c9d374314d191b0d2157bb45f..8234216020ae08cbb9cd5ad45930009f3af27273 100644
--- a/chrome/browser/ui/ash/app_list/app_list_service_ash.h
+++ b/chrome/browser/ui/ash/app_list/app_list_service_ash.h
@@ -9,11 +9,11 @@
 
 #include "base/macros.h"
 #include "chrome/browser/ui/app_list/app_list_service_impl.h"
-#include "chrome/browser/ui/ash/app_list/app_list_presenter_service.h"
 #include "ui/app_list/app_list_model.h"
 
+class AppListPresenterService;
+
 namespace app_list {
-class AppListPresenter;
 class AppListPresenterImpl;
 class AppListPresenterDelegateFactory;
 }
@@ -30,7 +30,7 @@ class AppListServiceAsh : public AppListServiceImpl {
  public:
   static AppListServiceAsh* GetInstance();
 
-  app_list::AppListPresenter* GetAppListPresenter();
+  app_list::AppListPresenterImpl* GetAppListPresenter();
 
   // AppListService overrides:
   void Init(Profile* initial_profile) override;
@@ -76,8 +76,7 @@ class AppListServiceAsh : public AppListServiceImpl {
       presenter_delegate_factory_;
   std::unique_ptr<app_list::AppListPresenterImpl> app_list_presenter_;
   std::unique_ptr<AppListControllerDelegateAsh> controller_delegate_;
-
-  AppListPresenterService app_list_presenter_service_;
+  std::unique_ptr<AppListPresenterService> app_list_presenter_service_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListServiceAsh);
 };