Remove KEYBOARD_EXPORT.

ui/keyboard/keyboard_controller_observer.h

Index: ui/keyboard/keyboard_controller_observer.h
diff --git a/ui/keyboard/keyboard_controller_observer.h b/ui/keyboard/keyboard_controller_observer.h
index 63fa721c1a4023f96d9ed625616e11abc1417802..7c6d667fbd22b5a6291ca3ba38d376a901c51a74 100644
--- a/ui/keyboard/keyboard_controller_observer.h
+++ b/ui/keyboard/keyboard_controller_observer.h
@@ -15,7 +15,7 @@ namespace keyboard {
 
 // Observers to the KeyboardController are notified of significant events that
 // occur with the keyboard, such as the bounds or visiility changing.
-class KEYBOARD_EXPORT KeyboardControllerObserver {
+class  KeyboardControllerObserver {
  public:
   virtual ~KeyboardControllerObserver() {}