Remove message_loop_helpers.h and update the includes to point to the new location.

webkit/plugins/npapi/webplugin_delegate_impl.h

 // 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.
 
 #ifndef WEBKIT_PLUGINS_NPAPI_WEBPLUGIN_DELEGATE_IMPL_H_
 #define WEBKIT_PLUGINS_NPAPI_WEBPLUGIN_DELEGATE_IMPL_H_
 
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/message_loop_helpers.h"
+#include "base/sequenced_task_runner_helpers.h"
 #include "base/time.h"
 #include "base/timer.h"
 #include "build/build_config.h"
 #include "third_party/npapi/bindings/npapi.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/rect.h"
+#include "webkit/glue/webcursor.h"
 #include "webkit/plugins/npapi/webplugin_delegate.h"
-#include "webkit/glue/webcursor.h"
 #include "webkit/plugins/webkit_plugins_export.h"
 
 #if defined(OS_WIN) && !defined(USE_AURA)
 #include "base/memory/weak_ptr.h"
 #endif
 
 #if defined(USE_X11)
 #include "ui/base/x/x11_util.h"
 
 typedef struct _GdkDrawable GdkPixmap;
@@ skipping 533 matching lines @@
   // True if NPP_New did not return an error.
   bool creation_succeeded_;
 
   DISALLOW_COPY_AND_ASSIGN(WebPluginDelegateImpl);
 };
 
 }  // namespace npapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_NPAPI_WEBPLUGIN_DELEGATE_IMPL_H_