Revert of chromeos: Remove some IME methods from ash::SystemTrayDelegate

chrome/browser/ui/ash/ash_init.cc

Index: chrome/browser/ui/ash/ash_init.cc
diff --git a/chrome/browser/ui/ash/ash_init.cc b/chrome/browser/ui/ash/ash_init.cc
index e99e43ee85d64ec0052e1ac1a31960510444dec6..54f7e2ab5705304f3a49212a0c39af6e1e4ba0f7 100644
--- a/chrome/browser/ui/ash/ash_init.cc
+++ b/chrome/browser/ui/ash/ash_init.cc
@@ -32,6 +32,7 @@
 #include "chrome/browser/ui/ash/chrome_screenshot_grabber.h"
 #include "chrome/browser/ui/ash/chrome_shell_content_state.h"
 #include "chrome/browser/ui/ash/chrome_shell_delegate.h"
+#include "chrome/browser/ui/ash/ime_controller_chromeos.h"
 #include "chrome/common/chrome_switches.h"
 #include "chromeos/accelerometer/accelerometer_reader.h"
 #include "chromeos/chromeos_switches.h"
@@ -135,6 +136,8 @@
       base::CreateSequencedTaskRunnerWithTraits(
           {base::MayBlock(), base::TaskPriority::BACKGROUND,
            base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN}));
+  shell->accelerator_controller()->SetImeControlDelegate(
+      std::unique_ptr<ash::ImeControlDelegate>(new ImeController));
   shell->high_contrast_controller()->SetEnabled(
       chromeos::AccessibilityManager::Get()->IsHighContrastEnabled());