[FYI] All-in-one OnCandidateWindow{Show,Update,Hide}

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 "base/bind.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/aura/client/focus_client.h"
@@ skipping 140 matching lines @@
   virtual bool DeleteRange(const gfx::Range& range) OVERRIDE { return false; }
   virtual bool GetTextFromRange(const gfx::Range& range,
                                 base::string16* text) const OVERRIDE {
     return false;
   }
   virtual void OnInputMethodChanged() OVERRIDE {}
   virtual bool ChangeTextDirectionAndLayoutAlignment(
       base::i18n::TextDirection direction) OVERRIDE { return false; }
   virtual void ExtendSelectionAndDelete(size_t before, size_t after) OVERRIDE {}
   virtual void EnsureCaretInRect(const gfx::Rect& rect) OVERRIDE {}
+  virtual void OnCandidateWindowShow() OVERRIDE {}
+  virtual void OnCandidateWindowUpdate() OVERRIDE {}
+  virtual void OnCandidateWindowHide() OVERRIDE {}
 
   ui::TextInputType type_;
 
   DISALLOW_COPY_AND_ASSIGN(TestTextInputClient);
 };
 
 class KeyboardContainerObserver : public aura::WindowObserver {
  public:
   explicit KeyboardContainerObserver(aura::Window* window) : window_(window) {
     window_->AddObserver(this);
@@ skipping 189 matching lines @@
 
   EXPECT_TRUE(keyboard_container->IsVisible());
 
   input_method->SetFocusedTextInputClient(&no_input_client);
   // Keyboard should not hide itself after lost focus.
   EXPECT_TRUE(keyboard_container->IsVisible());
   EXPECT_FALSE(WillHideKeyboard());
 }
 
 }  // namespace keyboard