Turn NULL used as int to 0.

webkit/tools/test_shell/webwidget_host_gtk.cc

 // Copyright (c) 2006-2008 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 "webkit/tools/test_shell/webwidget_host.h"
 
 #include <cairo/cairo.h>
 #include <gtk/gtk.h>
 
 #include "base/basictypes.h"
@@ skipping 301 matching lines @@
       scroll_dx_(0),
       scroll_dy_(0) {
   set_painting(false);
 }
 
 WebWidgetHost::~WebWidgetHost() {
   // We may be deleted before the view_. Clear out the signals so that we don't
   // attempt to invoke something on a deleted object.
   g_object_set_data(G_OBJECT(view_), kWebWidgetHostKey, NULL);
   g_signal_handlers_disconnect_matched(view_,
-      G_SIGNAL_MATCH_DATA, 0, NULL, NULL, NULL, this);
+      G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, this);
   webwidget_->close();
 }
 
 void WebWidgetHost::Resize(const gfx::Size &newsize) {
   // The pixel buffer backing us is now the wrong size
   canvas_.reset();
   logical_size_ = newsize;
   webwidget_->resize(newsize);
 }
 
@@ skipping 72 matching lines @@
 
 void WebWidgetHost::PaintRect(const gfx::Rect& rect) {
   set_painting(true);
   webwidget_->paint(canvas_.get(), rect);
   set_painting(false);
 }
 
 void WebWidgetHost::WindowDestroyed() {
   delete this;
 }