GTK: Now that we depend on gtk 2.18+, replace this pattern:

chrome/browser/ui/gtk/location_bar_view_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/location_bar_view_gtk.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 617 matching lines @@
   for (ScopedVector<ContentSettingImageViewGtk>::iterator i(
            content_setting_views_.begin());
        i != content_setting_views_.end(); ++i) {
     (*i)->UpdateFromTabContents(
         toolbar_model_->input_in_progress() ? NULL : tab_contents);
     any_visible = (*i)->IsVisible() || any_visible;
   }
 
   // If there are no visible content things, hide the top level box so it
   // doesn't mess with padding.
-  if (any_visible)
-    gtk_widget_show(content_setting_hbox_.get());
-  else
-    gtk_widget_hide(content_setting_hbox_.get());
+  gtk_widget_set_visible(content_setting_hbox_.get(), any_visible);
 }
 
 void LocationBarViewGtk::UpdatePageActions() {
   std::vector<ExtensionAction*> page_actions;
   ExtensionService* service = profile_->GetExtensionService();
   if (!service)
     return;
 
   // Find all the page actions.
   for (size_t i = 0; i < service->extensions()->size(); ++i) {
@@ skipping 23 matching lines @@
     GURL url = GURL(WideToUTF8(toolbar_model_->GetText()));
 
     for (size_t i = 0; i < page_action_views_.size(); i++) {
       page_action_views_[i]->UpdateVisibility(
           toolbar_model_->input_in_progress() ? NULL : contents, url);
     }
   }
 
   // If there are no visible page actions, hide the hbox too, so that it does
   // not affect the padding in the location bar.
-  if (PageActionVisibleCount() && !ShouldOnlyShowLocation())
-    gtk_widget_show(page_action_hbox_.get());
-  else
-    gtk_widget_hide(page_action_hbox_.get());
+  gtk_widget_set_visible(page_action_hbox_.get(),
+                         PageActionVisibleCount() && !ShouldOnlyShowLocation());
 }
 
 void LocationBarViewGtk::InvalidatePageActions() {
   size_t count_before = page_action_views_.size();
   page_action_views_.reset();
   if (page_action_views_.size() != count_before) {
     NotificationService::current()->Notify(
         NotificationType::EXTENSION_PAGE_ACTION_COUNT_CHANGED,
         Source<LocationBar>(this),
         NotificationService::NoDetails());
@@ skipping 926 matching lines @@
 
   std::string badge_text = page_action_->GetBadgeText(tab_id);
   if (badge_text.empty())
     return FALSE;
 
   gfx::CanvasSkiaPaint canvas(event, false);
   gfx::Rect bounding_rect(widget->allocation);
   page_action_->PaintBadge(&canvas, bounding_rect, tab_id);
   return FALSE;
 }