Remove unused includes from various .cpp files in core/

Source/core/page/PageSerializer.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 25 matching lines @@
 #include "core/css/CSSImportRule.h"
 #include "core/css/CSSStyleRule.h"
 #include "core/css/StylePropertySet.h"
 #include "core/css/StyleRule.h"
 #include "core/css/StyleSheetContents.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/Text.h"
 #include "core/editing/MarkupAccumulator.h"
 #include "core/html/HTMLFrameOwnerElement.h"
-#include "core/html/HTMLHeadElement.h"
 #include "core/html/HTMLImageElement.h"
 #include "core/html/HTMLLinkElement.h"
 #include "core/html/HTMLStyleElement.h"
 #include "core/html/parser/HTMLMetaCharsetParser.h"
 #include "core/loader/cache/CachedImage.h"
 #include "core/page/Frame.h"
 #include "core/page/Page.h"
-#include "core/platform/MIMETypeRegistry.h"
 #include "core/platform/SerializedResource.h"
 #include "core/platform/graphics/Image.h"
-#include "core/platform/network/HTTPParsers.h"
 #include "core/rendering/style/StyleCachedImage.h"
 #include "core/rendering/style/StyleImage.h"
 #include "wtf/text/CString.h"
 #include "wtf/text/StringBuilder.h"
 #include "wtf/text/TextEncoding.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 static bool isCharsetSpecifyingNode(Node* node)
@@ skipping 271 matching lines @@
     if (iter != m_blankFrameURLs.end())
         return iter->value;
     String url = "wyciwyg://frame/" + String::number(m_blankFrameCounter++);
     KURL fakeURL(ParsedURLString, url);
     m_blankFrameURLs.add(frame, fakeURL);
 
     return fakeURL;
 }
 
 }