Add action for each button on opt-in IME menu.

ui/keyboard/keyboard_controller_unittest.cc

 // Copyright (c) 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/keyboard/keyboard_controller.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 202 matching lines @@
     root_window()->SetBounds(
         gfx::Rect(0, 0, root_bounds.height(), root_bounds.width()));
   }
 
  protected:
   // KeyboardControllerObserver overrides
   void OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) override {
     notified_bounds_ = new_bounds;
     number_of_calls_++;
   }
+  void OnKeyboardHidden() override {}
 
   int number_of_calls() const { return number_of_calls_; }
 
   const gfx::Rect& notified_bounds() { return notified_bounds_; }
 
   void SetFocus(ui::TextInputClient* client) {
     ui::InputMethod* input_method = ui()->GetInputMethod();
     input_method->SetFocusedTextInputClient(client);
     if (client && client->GetTextInputType() != ui::TEXT_INPUT_TYPE_NONE) {
       input_method->ShowImeIfNeeded();
@@ skipping 425 matching lines @@
   gfx::Rect new_bounds(0, 0, 1280, 800);
   ASSERT_NE(new_bounds, root_window()->bounds());
   EXPECT_EQ(1, number_of_calls());
   root_window()->SetBounds(new_bounds);
   EXPECT_EQ(2, number_of_calls());
   MockRotateScreen();
   EXPECT_EQ(3, number_of_calls());
 }
 
 }  // namespace keyboard