Set a reasonable icon for the media galleries scan result dialog folder viewer.

chrome/browser/ui/cocoa/extensions/media_galleries_scan_result_dialog_cocoa.mm

 // Copyright 2014 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 "chrome/browser/ui/cocoa/extensions/media_galleries_scan_result_dialog_cocoa.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/browser/ui/chrome_style.h"
@@ skipping 256 matching lines @@
   if (gallery.IsGalleryAvailable()) {
     folder_viewer.reset(
         [[MediaGalleriesScanResultButton alloc] initWithFrame:NSZeroRect
                                                dialog:this
                                                prefId:gallery.pref_id]);
     [folder_viewer setButtonType:NSMomentaryChangeButton];
     [folder_viewer setTarget:cocoa_controller_];
     [folder_viewer setAction:@selector(onFolderViewClicked:)];
 
     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
-    [folder_viewer setImage:
-        rb.GetNativeImageNamed(IDR_UPDATE_FAILED).ToNSImage()];
+    [folder_viewer setImage:rb.GetNativeImageNamed(
+        IDR_FILE_FOLDER).ToNSImage()];
     [folder_viewer setTitle:nil];
+    [folder_viewer setBordered:false];
     [folder_viewer setToolTip:
         base::SysUTF16ToNSString(gallery.GetGalleryTooltip())];
     [folder_viewer sizeToFit];
     folder_viewer_rect = [folder_viewer bounds];
   } else {
     folder_viewer_rect.size.width = -kCheckboxMargin;
   }
 
   // Additional details text.
   base::scoped_nsobject<NSTextField> details(
@@ skipping 64 matching lines @@
   return controller_->GetContextMenu(prefid);
 }
 
 // static
 MediaGalleriesScanResultDialog* MediaGalleriesScanResultDialog::Create(
     MediaGalleriesScanResultDialogController* controller) {
   base::scoped_nsobject<MediaGalleriesScanResultCocoaController>
       cocoa_controller([[MediaGalleriesScanResultCocoaController alloc] init]);
   return new MediaGalleriesScanResultDialogCocoa(controller, cocoa_controller);
 }