Remove task.h and finish base::Bind() migration.

webkit/plugins/ppapi/ppb_scrollbar_impl.h

 // Copyright (c) 2011 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_PPAPI_PPB_SCROLLBAR_IMPL_H_
 #define WEBKIT_PLUGINS_PPAPI_PPB_SCROLLBAR_IMPL_H_
 
 #include <vector>
 
 #include "base/memory/weak_ptr.h"
-#include "base/task.h"
 #include "ppapi/thunk/ppb_scrollbar_api.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebRect.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebScrollbarClient.h"
 #include "ui/gfx/rect.h"
 #include "webkit/plugins/ppapi/ppb_widget_impl.h"
 
 namespace webkit {
 namespace ppapi {
 
 class PPB_Scrollbar_Impl : public PPB_Widget_Impl,
@@ skipping 46 matching lines @@
   // Used so that the post task for Invalidate doesn't keep an extra reference.
   base::WeakPtrFactory<PPB_Scrollbar_Impl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_Scrollbar_Impl);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PPB_SCROLLBAR_IMPL_H_