Simplify InputMethodWin initialization.

ui/base/ime/dummy_input_method.cc

 // Copyright 2013 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/dummy_input_method.h"
 
 namespace ui {
 
 DummyInputMethod::DummyInputMethod() {
 }
@@ skipping 38 matching lines @@
 void DummyInputMethod::CancelComposition(const TextInputClient* client) {
 }
 
 void DummyInputMethod::OnInputLocaleChanged() {
 }
 
 std::string DummyInputMethod::GetInputLocale() {
   return std::string();
 }
 
-bool DummyInputMethod::IsActive() {
-  return true;
-}
-
 TextInputType DummyInputMethod::GetTextInputType() const {
   return TEXT_INPUT_TYPE_NONE;
 }
 
 TextInputMode DummyInputMethod::GetTextInputMode() const {
   return TEXT_INPUT_MODE_DEFAULT;
 }
 
 int DummyInputMethod::GetTextInputFlags() const {
   return 0;
@@ skipping 10 matching lines @@
 void DummyInputMethod::ShowImeIfNeeded() {
 }
 
 void DummyInputMethod::AddObserver(InputMethodObserver* observer) {
 }
 
 void DummyInputMethod::RemoveObserver(InputMethodObserver* observer) {
 }
 
 }  // namespace ui