Simplify InputMethodWin initialization.

ui/base/ime/input_method_chromeos.cc

 // 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_chromeos.h"
 
 #include <algorithm>
 #include <cstring>
 #include <set>
 #include <vector>
@@ skipping 241 matching lines @@
 
 void InputMethodChromeOS::OnInputLocaleChanged() {
   // Not supported.
 }
 
 std::string InputMethodChromeOS::GetInputLocale() {
   // Not supported.
   return "";
 }
 
-bool InputMethodChromeOS::IsActive() {
-  return true;
-}
-
 bool InputMethodChromeOS::IsCandidatePopupOpen() const {
   // TODO(yukishiino): Implement this method.
   return false;
 }
 
 void InputMethodChromeOS::OnWillChangeFocusedClient(
     TextInputClient* focused_before,
     TextInputClient* focused) {
   ConfirmCompositionText();
 
@@ skipping 398 matching lines @@
 bool InputMethodChromeOS::IsNonPasswordInputFieldFocused() {
   TextInputType type = GetTextInputType();
   return (type != TEXT_INPUT_TYPE_NONE) && (type != TEXT_INPUT_TYPE_PASSWORD);
 }
 
 bool InputMethodChromeOS::IsInputFieldFocused() {
   return GetTextInputType() != TEXT_INPUT_TYPE_NONE;
 }
 
 }  // namespace ui