Linux: Fix some GdkPixbuf leaks.

chrome/browser/gtk/extension_installed_bubble_gtk.cc

 // Copyright (c) 2009 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/gtk/extension_installed_bubble_gtk.h"
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "base/i18n/rtl.h"
 #include "base/message_loop.h"
@@ skipping 132 matching lines @@
     g_object_unref(old);
   }
 
   // Put Icon in top of the left column.
   GtkWidget* icon_column = gtk_vbox_new(FALSE, 0);
   // Use 3 pixel padding to get visual balance with InfoBubble border on the
   // left.
   gtk_box_pack_start(GTK_BOX(bubble_content), icon_column, FALSE, FALSE,
       kIconPadding);
   GtkWidget* image = gtk_image_new_from_pixbuf(pixbuf);
+  g_object_unref(pixbuf);
   gtk_box_pack_start(GTK_BOX(icon_column), image, FALSE, FALSE, 0);
 
   // Center text column.
   GtkWidget* text_column = gtk_vbox_new(FALSE, kTextColumnVerticalSpacing);
   gtk_box_pack_start(GTK_BOX(bubble_content), text_column, FALSE, FALSE, 0);
 
   // Heading label
   GtkWidget* heading_label = gtk_label_new(NULL);
   std::string heading_text = WideToUTF8(l10n_util::GetStringF(
       IDS_EXTENSION_INSTALLED_HEADING,
@@ skipping 79 matching lines @@
   // the window before we call Release() because close_button_ depends
   // on all references being cleared before it is destroyed.
   MessageLoopForUI::current()->PostTask(FROM_HERE, NewRunnableMethod(this,
       &ExtensionInstalledBubbleGtk::Close));
 }
 
 void ExtensionInstalledBubbleGtk::Close() {
   Release();  // Balanced in ctor.
   info_bubble_ = NULL;
 }