Remove unnecessary Document.h includes in .cpp files

Source/core/css/MediaValuesDynamic.cpp

 // Copyright 2014 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 "config.h"
 #include "core/css/MediaValuesDynamic.h"
 
 #include "core/css/CSSHelper.h"
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/css/CSSToLengthConversionData.h"
-#include "core/dom/Document.h"
 #include "core/frame/LocalFrame.h"
 
 namespace WebCore {
 
 PassRefPtr<MediaValues> MediaValuesDynamic::create(LocalFrame* frame)
 {
     return adoptRef(new MediaValuesDynamic(frame));
 }
 
 MediaValuesDynamic::MediaValuesDynamic(LocalFrame* frame)
@@ skipping 101 matching lines @@
 {
     return m_frame->document();
 }
 
 bool MediaValuesDynamic::hasValues() const
 {
     return m_frame;
 }
 
 } // namespace