Re-enable save package on linux.

chrome/common/platform_util_linux.cc

Index: chrome/common/platform_util_linux.cc
===================================================================
--- chrome/common/platform_util_linux.cc	(revision 12923)
+++ chrome/common/platform_util_linux.cc	(working copy)
@@ -4,6 +4,8 @@
 
 #include "chrome/common/platform_util.h"
 
+#include <gtk/gtk.h>
+
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/process_util.h"
@@ -25,4 +27,8 @@
   base::LaunchApp(argv, no_files, false, NULL);
 }
 
+gfx::NativeWindow GetTopLevel(gfx::NativeView view) {
+  return GTK_WINDOW(gtk_widget_get_toplevel(view));
+}
+
 }  // namespace platform_util