Change DCHECK in BookmarkBarGtk to DLOG and return.

chrome/browser/ui/gtk/bookmark_bar_gtk.cc

 // 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.
 
 #include "chrome/browser/ui/gtk/bookmark_bar_gtk.h"
 
 #include <vector>
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_node_data.h"
@@ skipping 787 matching lines @@
       // it manually by telling the toolbar area to redraw itself.
       window_->QueueToolbarRedraw();
     }
   }
 }
 
 void BookmarkBarGtk::Observe(NotificationType type,
                              const NotificationSource& source,
                              const NotificationDetails& details) {
   if (type == NotificationType::BROWSER_THEME_CHANGED) {
-    if (model_) {
+    if (model_ && model_->IsLoaded()) {
       // Regenerate the bookmark bar with all new objects with their theme
       // properties set correctly for the new theme.
       RemoveAllBookmarkButtons();
       CreateAllBookmarkButtons();
-    } else {
-      DLOG(ERROR) << "Received a theme change notification while we "
-                  << "don't have a BookmarkModel. Taking no action.";
     }
 
     UpdateEventBoxPaintability();
 
     GdkColor paint_box_color =
         theme_provider_->GetGdkColor(BrowserThemeProvider::COLOR_TOOLBAR);
     gtk_widget_modify_bg(paint_box_, GTK_STATE_NORMAL, &paint_box_color);
 
     if (floating_) {
       GdkColor stroke_color = theme_provider_->UseGtkTheme() ?
@@ skipping 581 matching lines @@
 
   // Find the GtkWidget* for the actual target button.
   int shift = dir == GTK_MENU_DIR_PARENT ? -1 : 1;
   button_idx = (button_idx + shift + folder_list.size()) % folder_list.size();
   PopupForButton(folder_list[button_idx]);
 }
 
 void BookmarkBarGtk::CloseMenu() {
   current_context_menu_->Cancel();
 }