Use mojo app list interfaces for mash and classic ash.

ash/shell/content/client/shell_browser_main_parts.cc

Index: ash/shell/content/client/shell_browser_main_parts.cc
diff --git a/ash/shell/content/client/shell_browser_main_parts.cc b/ash/shell/content/client/shell_browser_main_parts.cc
index 7fac63e99aa2c30d9963c2d13017b2ba78807439..bb8584002a4f4139d61f266366c6158ccaeb2a15 100644
--- a/ash/shell/content/client/shell_browser_main_parts.cc
+++ b/ash/shell/content/client/shell_browser_main_parts.cc
@@ -10,6 +10,7 @@
 #include "ash/content/shell_content_state.h"
 #include "ash/shell.h"
 #include "ash/shell/content/shell_content_state_impl.h"
+#include "ash/shell/example_app_list_presenter.h"
 #include "ash/shell/shell_delegate_impl.h"
 #include "ash/shell/window_watcher.h"
 #include "ash/shell_init_params.h"
@@ -27,6 +28,7 @@
 #include "content/shell/browser/shell_browser_context.h"
 #include "content/shell/browser/shell_net_log.h"
 #include "net/base/net_module.h"
+#include "ui/app_list/presenter/app_list.h"
 #include "ui/aura/env.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_tree_host.h"
@@ -146,6 +148,11 @@ void ShellBrowserMainParts::PreMainMessageLoopRun() {
 
   ash::shell::InitWindowTypeLauncher();
 
+  // Initialize the example app list presenter.
+  example_app_list_presenter_ = base::MakeUnique<ExampleAppListPresenter>();
+  WmShell::Get()->app_list()->SetAppListPresenter(
+      example_app_list_presenter_->CreateInterfacePtrAndBind());
+
   ash::Shell::GetPrimaryRootWindow()->GetHost()->Show();
 }