It is time.

ui/base/ime/input_method_mac.mm

Index: ui/base/ime/input_method_mac.mm
diff --git a/ui/base/ime/input_method_mac.mm b/ui/base/ime/input_method_mac.mm
deleted file mode 100644
index c4b55c984d93082e905544ba56eac4e885979be3..0000000000000000000000000000000000000000
--- a/ui/base/ime/input_method_mac.mm
+++ /dev/null
@@ -1,49 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ui/base/ime/input_method_mac.h"
-
-namespace ui {
-
-InputMethodMac::InputMethodMac(internal::InputMethodDelegate* delegate) {
-  SetDelegate(delegate);
-}
-
-InputMethodMac::~InputMethodMac() {
-}
-
-bool InputMethodMac::OnUntranslatedIMEMessage(const base::NativeEvent& event,
-                                              NativeEventResult* result) {
-  return false;
-}
-
-bool InputMethodMac::DispatchKeyEvent(const ui::KeyEvent& event) {
-  // IME processing on the Mac does not go through this path.
-  NOTREACHED();
-  return false;
-}
-
-void InputMethodMac::OnCaretBoundsChanged(const TextInputClient* client) {
-}
-
-void InputMethodMac::CancelComposition(const TextInputClient* client) {
-}
-
-void InputMethodMac::OnInputLocaleChanged() {
-}
-
-std::string InputMethodMac::GetInputLocale() {
-  return "";
-}
-
-bool InputMethodMac::IsActive() {
-  return true;
-}
-
-bool InputMethodMac::IsCandidatePopupOpen() const {
-  // There seems to be no way to tell if a candidate window is open.
-  return false;
-}
-
-}  // namespace ui