mash: Have chrome set itself as the app list presenter.

ash/common/mojo_interface_factory.cc

Index: ash/common/mojo_interface_factory.cc
diff --git a/ash/common/mojo_interface_factory.cc b/ash/common/mojo_interface_factory.cc
index ef0b47f774cee1364c4553741be7a808205622ae..27967024621a94ef4cd4d794de4561e6f94cd923 100644
--- a/ash/common/mojo_interface_factory.cc
+++ b/ash/common/mojo_interface_factory.cc
@@ -10,6 +10,7 @@
 #include "ash/common/cast_config_controller.h"
 #include "ash/common/new_window_controller.h"
 #include "ash/common/shelf/shelf_controller.h"
+#include "ash/common/shell_delegate.h"
 #include "ash/common/shutdown_controller.h"
 #include "ash/common/system/locale/locale_notification_controller.h"
 #include "ash/common/system/tray/system_tray_controller.h"
@@ -18,6 +19,7 @@
 #include "ash/common/wm_shell.h"
 #include "base/bind.h"
 #include "services/service_manager/public/cpp/interface_registry.h"
+#include "ui/app_list/presenter/app_list.h"
 
 #if defined(OS_CHROMEOS)
 #include "ash/common/system/chromeos/network/vpn_list.h"
@@ -32,6 +34,10 @@ void BindAcceleratorControllerRequestOnMainThread(
   WmShell::Get()->accelerator_controller()->BindRequest(std::move(request));
 }
 
+void BindAppListRequestOnMainThread(app_list::mojom::AppListRequest request) {
+  WmShell::Get()->app_list()->BindRequest(std::move(request));
+}
+
 void BindCastConfigOnMainThread(mojom::CastConfigRequest request) {
   WmShell::Get()->cast_config()->BindRequest(std::move(request));
 }
@@ -85,6 +91,8 @@ void RegisterInterfaces(
   registry->AddInterface(
       base::Bind(&BindAcceleratorControllerRequestOnMainThread),
       main_thread_task_runner);
+  registry->AddInterface(base::Bind(&BindAppListRequestOnMainThread),
+                         main_thread_task_runner);
   registry->AddInterface(base::Bind(&BindCastConfigOnMainThread),
                          main_thread_task_runner);
   registry->AddInterface(