Rubber-stamped by Eric Seidel.

        Move HTMLConstructionSite to its own file.  No behavior change.

        * Android.mk:
        * CMakeLists.txt:
        * GNUmakefile.am:
        * WebCore.gypi:
        * WebCore.pro:
        * WebCore.vcproj/WebCore.vcproj:
        * WebCore.xcodeproj/project.pbxproj:
        * html/HTMLConstructionSite.cpp: Copied from WebCore/html/HTMLTreeBuilder.cpp.
        (WebCore::HTMLNames::hasImpliedEndTag):
        (WebCore::HTMLConstructionSite::attach):
        (WebCore::HTMLConstructionSite::HTMLConstructionSite):
        (WebCore::HTMLConstructionSite::~HTMLConstructionSite):
        (WebCore::HTMLConstructionSite::insertHTMLHtmlStartTagBeforeHTML):
        (WebCore::HTMLConstructionSite::mergeAttributesFromTokenIntoElement):
        (WebCore::HTMLConstructionSite::insertHTMLHtmlStartTagInBody):
        (WebCore::HTMLConstructionSite::insertHTMLBodyStartTagInBody):
        * html/HTMLConstructionSite.h: Copied from WebCore/html/HTMLTreeBuilder.h.
        * html/HTMLTreeBuilder.cpp:
        * html/HTMLTreeBuilder.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@62610 268f45cc-cd09-0410-ab3c-d52691b4dbfc