Introduce ash mojo interface for lock screen action handlers

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

Index: chrome/browser/chromeos/chrome_browser_main_chromeos.cc
diff --git a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
index 2dbda14ecf242471155366f32f4231e7ca0f22e9..2840377dde423f13a1b377a78c932fa9ddbc48b7 100644
--- a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
+++ b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
@@ -55,6 +55,7 @@
 #include "chrome/browser/chromeos/input_method/input_method_util.h"
 #include "chrome/browser/chromeos/language_preferences.h"
 #include "chrome/browser/chromeos/libc_close_tracking.h"
+#include "chrome/browser/chromeos/lock_screen_apps/state_controller.h"
 #include "chrome/browser/chromeos/login/helper.h"
 #include "chrome/browser/chromeos/login/lock/screen_locker.h"
 #include "chrome/browser/chromeos/login/login_wizard.h"
@@ -606,6 +607,12 @@ void ChromeBrowserMainPartsChromeos::PreProfileInit() {
   // In Aura builds this will initialize ash::Shell.
   ChromeBrowserMainPartsLinux::PreProfileInit();
 
+  if (lock_screen_apps::StateController::IsEnabled()) {
+    lock_screen_apps_state_controller_ =
+        base::MakeUnique<lock_screen_apps::StateController>();
+    lock_screen_apps_state_controller_->Initialize();
+  }
+
   if (immediate_login) {
     const std::string cryptohome_id =
         parsed_command_line().GetSwitchValueASCII(switches::kLoginUser);
@@ -859,6 +866,8 @@ void ChromeBrowserMainPartsChromeos::PostMainMessageLoopRun() {
 
   BootTimesRecorder::Get()->AddLogoutTimeMarker("UIMessageLoopEnded", true);
 
+  lock_screen_apps_state_controller_.reset();
+
   // This must be shut down before |arc_service_launcher_|.
   NoteTakingHelper::Shutdown();