Fix preedit handling on IME switching.

chrome/browser/chromeos/input_method/input_method_manager_impl_unittest.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/input_method/input_method_manager_impl.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 966 matching lines @@
 
 TEST_F(InputMethodManagerImplTest, TestReset) {
   manager_->SetState(InputMethodManager::STATE_BROWSER_SCREEN);
   std::vector<std::string> ids;
   ids.push_back("xkb:us::eng");
   ids.push_back("mozc");
   EXPECT_TRUE(manager_->EnableInputMethods(ids));
   EXPECT_EQ(2U, manager_->GetNumActiveInputMethods());
   EXPECT_EQ(1, controller_->reset_count_);
   manager_->ChangeInputMethod("mozc");
+  EXPECT_EQ(1, controller_->change_input_method_count_);
+  EXPECT_EQ("mozc", controller_->change_input_method_id_);
   EXPECT_EQ(1, controller_->reset_count_);
   manager_->ChangeInputMethod("xkb:us::eng");
-  EXPECT_EQ(2, controller_->reset_count_);
+  EXPECT_EQ(2, controller_->change_input_method_count_);
+  EXPECT_EQ("mozc", controller_->change_input_method_id_);
+  EXPECT_EQ(1, controller_->reset_count_);
 }
 
 }  // namespace input_method
 }  // namespace chromeos