[Mac] Hide bookmark bar empty view by default

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

 // Copyright (c) 2011 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 "chrome/browser/ui/cocoa/bookmarks/bookmark_bar_view_cocoa.h"
 
 #include "base/metrics/user_metrics.h"
 #include "chrome/browser/profiles/profile.h"
 #import "chrome/browser/themes/theme_properties.h"
 #import "chrome/browser/themes/theme_service.h"
@@ skipping 90 matching lines @@
         buttonWithString:l10n_util::GetNSString(IDS_BOOKMARK_BAR_IMPORT_LINK)];
     importBookmarksButton_.reset([importButton retain]);
     [importBookmarksButton_
         setFrame:NSMakeRect(NSMaxX([noItemTextField_ frame]) +
                                 kTextFieldTrailingPadding,
                             kInitialElementYOrigin, CGFLOAT_MAX,
                             kInitialElementHeight)];
     [importBookmarksButton_ setFont:smallSystemFont];
     [importBookmarksButton_ sizeToFit];
 
+    // Hide by default so these don't flash if it takes a while for the bookmark
+    // model to load.
+    [noItemTextField_ setHidden:YES];
+    [importBookmarksButton_ setHidden:YES];
+
     [self addSubview:noItemTextField_];
     [self addSubview:importBookmarksButton_];
     [self registerForNotificationsAndDraggedTypes];
   }
   return self;
 }
 
 - (void)registerForNotificationsAndDraggedTypes {
   NSNotificationCenter* defaultCenter = [NSNotificationCenter defaultCenter];
   [defaultCenter addObserver:self
@@ skipping 206 matching lines @@
 
 - (NSMenu*)menu {
   return [[controller_ menuController] menuForBookmarkBar];
 }
 
 - (ViewID)viewID {
   return VIEW_ID_BOOKMARK_BAR;
 }
 
 @end  // @implementation BookmarkBarView