fix a memory leak and add a suppression

chrome/browser/ui/gtk/tabs/tab_renderer_gtk.cc

 // 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 "chrome/browser/ui/gtk/tabs/tab_renderer_gtk.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/debug/trace_event.h"
@@ skipping 852 matching lines @@
   if (loading_animation_.animation_state() != ANIMATION_NONE) {
     PaintLoadingAnimation(widget, cr);
     return;
   }
 
   gfx::CairoCachedSurface* to_display = NULL;
   if (should_display_crashed_favicon_) {
     to_display = theme_service_->GetImageNamed(IDR_SAD_FAVICON)->ToCairo();
   } else if (!data_.favicon.isNull()) {
     if (data_.is_default_favicon && theme_service_->UsingNativeTheme()) {
-      to_display = GtkThemeService::GetDefaultFavicon(true)->ToCairo();
+      to_display = GtkThemeService::GetDefaultFavicon(true).ToCairo();
     } else if (data_.cairo_favicon.valid()) {
       to_display = &data_.cairo_favicon;
     }
   }
 
   if (to_display) {
     to_display->SetSource(cr,
                           widget,
                           favicon_bounds_.x(),
                           favicon_bounds_.y() + favicon_hiding_offset_);
@@ skipping 239 matching lines @@
   GdkPixbuf* tab_close = rb.GetNativeImageNamed(IDR_TAB_CLOSE).ToGdkPixbuf();
   close_button_width_ = gdk_pixbuf_get_width(tab_close);
   close_button_height_ = gdk_pixbuf_get_height(tab_close);
 
   const gfx::Font& base_font = rb.GetFont(ui::ResourceBundle::BaseFont);
   title_font_ = new gfx::Font(base_font.GetFontName(), kFontPixelSize);
   title_font_height_ = title_font_->GetHeight();
 
   initialized_ = true;
 }