Remove KEYBOARD_EXPORT.

ui/keyboard/keyboard_ui.h

 // Copyright 2015 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.
 
 #ifndef UI_KEYBOARD_KEYBOARD_UI_H_
 #define UI_KEYBOARD_KEYBOARD_UI_H_
 
 #include "base/macros.h"
 #include "ui/base/ime/text_input_type.h"
 #include "ui/keyboard/keyboard_export.h"
 
 namespace aura {
 class Window;
 }
 namespace gfx {
 class Rect;
 }
 namespace ui {
 class InputMethod;
 }
 
 namespace keyboard {
 
 class KeyboardController;
 
 // An interface implemented by an object that implements a keyboard UI.
-class KEYBOARD_EXPORT KeyboardUI {
+class  KeyboardUI {
  public:
   KeyboardUI();
   virtual ~KeyboardUI();
 
   // Gets the virtual keyboard window. May return null if the window has not yet
   // been created.
   virtual aura::Window* GetKeyboardWindow() = 0;
 
   // Whether the keyboard window has been created.
   virtual bool HasKeyboardWindow() const = 0;
@@ skipping 52 matching lines @@
 
  private:
   keyboard::KeyboardController* keyboard_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(KeyboardUI);
 };
 
 }  // namespace keyboard
 
 #endif  // UI_KEYBOARD_KEYBOARD_UI_H_