mac: Delete GetCachedImageWithName(), it's no longer used.

chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_button_cell_unittest.mm

 // Copyright (c) 2012 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/memory/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_button_cell.h"
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #include "grit/ui_resources.h"
 #include "ui/base/resource/resource_bundle.h"
-#include "ui/gfx/mac/nsimage_cache.h"
 
 namespace {
 
 class BookmarkBarFolderButtonCellTest : public CocoaTest {
 };
 
 // Basic creation.
 TEST_F(BookmarkBarFolderButtonCellTest, Create) {
   scoped_nsobject<BookmarkBarFolderButtonCell> cell;
   cell.reset([[BookmarkBarFolderButtonCell buttonCellForNode:nil
@@ skipping 53 matching lines @@
 
   [folder_cell setBookmarkCellText:@"test" image:image];
   float folder_cell_x_with_title = ([cell imageRectForBounds:rect]).origin.x;
   float folder_cell_width_with_title = ([cell cellSize]).width;
 
   EXPECT_EQ(folder_cell_x_without_title, folder_cell_x_with_title);
   EXPECT_EQ(folder_cell_width_without_title, folder_cell_width_with_title);
 }
 
 } // namespace