Revert 206237 "Menu for the OSX app launcher, HoverImageMenuButt..."

trunk/src/ui/base/cocoa/controls/hover_image_menu_button.mm

-// Copyright 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.
-
-#import "ui/base/cocoa/controls/hover_image_menu_button.h"
-
-#include "base/mac/foundation_util.h"
-#import "ui/base/cocoa/controls/hover_image_menu_button_cell.h"
-
-@implementation HoverImageMenuButton
-
-+ (Class)cellClass {
-  return [HoverImageMenuButtonCell class];
-}
-
-- (id)initWithFrame:(NSRect)frameRect
-          pullsDown:(BOOL)flag {
-  if ((self = [super initWithFrame:frameRect
-                         pullsDown:flag])) {
-    trackingArea_.reset(
-        [[CrTrackingArea alloc] initWithRect:NSZeroRect
-                                     options:NSTrackingInVisibleRect |
-                                             NSTrackingMouseEnteredAndExited |
-                                             NSTrackingActiveInKeyWindow
-                                       owner:self
-                                    userInfo:nil]);
-    [self addTrackingArea:trackingArea_.get()];
-  }
-  return self;
-}
-
-- (HoverImageMenuButtonCell*)hoverImageMenuButtonCell {
-  return base::mac::ObjCCastStrict<HoverImageMenuButtonCell>([self cell]);
-}
-
-- (void)mouseEntered:(NSEvent*)theEvent {
-  [[self cell] setHovered:YES];
-}
-
-- (void)mouseExited:(NSEvent*)theEvent {
-  [[self cell] setHovered:NO];
-}
-
-@end