Linux: Fix some GdkPixbuf leaks.

chrome/browser/gtk/extension_install_prompt_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 <gtk/gtk.h>
 
 #include "app/l10n_util.h"
 #include "base/rand_util.h"
 #include "base/string_util.h"
 #include "chrome/browser/browser_list.h"
@@ skipping 59 matching lines @@
   // Create a two column layout.
   GtkWidget* content_area = GTK_DIALOG(dialog)->vbox;
   gtk_box_set_spacing(GTK_BOX(content_area), gtk_util::kContentAreaSpacing);
 
   GtkWidget* icon_hbox = gtk_hbox_new(FALSE, gtk_util::kContentAreaSpacing);
   gtk_box_pack_start(GTK_BOX(content_area), icon_hbox, TRUE, TRUE, 0);
 
   // Put Icon in the left column.
   GdkPixbuf* pixbuf = gfx::GdkPixbufFromSkBitmap(skia_icon);
   GtkWidget* icon = gtk_image_new_from_pixbuf(pixbuf);
+  g_object_unref(pixbuf);
   gtk_box_pack_start(GTK_BOX(icon_hbox), icon, TRUE, TRUE, 0);
 
   // Create a new vbox for the right column.
   GtkWidget* right_column_area = gtk_vbox_new(FALSE, 0);
   gtk_box_pack_start(GTK_BOX(icon_hbox), right_column_area, TRUE, TRUE, 0);
 
   int heading_id = ExtensionInstallUI::kHeadingIds[type];
   std::string heading_text = WideToUTF8(l10n_util::GetStringF(
       heading_id, UTF8ToWide(extension->name())));
   GtkWidget* heading_label = MakeMarkupLabel("<span weight=\"bold\">%s</span>",
@@ skipping 28 matching lines @@
   BrowserWindowGtk* browser_window = static_cast<BrowserWindowGtk*>(
       browser->window());
   if (!browser_window) {
     delegate->InstallUIAbort();
     return;
   }
 
   ShowInstallPromptDialog(browser_window->window(), icon, extension,
       delegate, warning_text, type);
 }