https://bugs.webkit.org/show_bug.cgi?id=11646

Reviewed by Darin Adler.

Source/WebCore: 

Merge https://chromium.googlesource.com/chromium/blink/+/dc7879025e01d63be9fcf6a84ca6c9b8b5768a80

Implement the behavior specified in the current DOM4 working draft:
http://www.w3.org/TR/2013/WD-dom-20131107/#dom-node-clonenode

Tests: fast/dom/Document/clone-node.html
       fast/dom/HTMLDocument/clone-node-quirks-mode.html
       svg/custom/clone-node.html

* dom/Document.cpp:
(WebCore::Document::cloneNode):
(WebCore::Document::cloneDocumentWithoutChildren):
(WebCore::Document::cloneDataFromDocument):
* dom/Document.h:
* html/HTMLDocument.cpp:
(WebCore::HTMLDocument::cloneDocumentWithoutChildren):
* html/HTMLDocument.h:
* svg/SVGDocument.cpp:
(WebCore::SVGDocument::cloneDocumentWithoutChildren):
* svg/SVGDocument.h:

LayoutTests: 

* dom/xhtml/level3/core/documentgetinputencoding04-expected.txt:
* dom/xhtml/level3/core/documentgetxmlencoding05-expected.txt:
* dom/xhtml/level3/core/nodeisequalnode01-expected.txt:
* dom/xhtml/level3/core/nodeisequalnode21-expected.txt:
* dom/xhtml/level3/core/nodeisequalnode25-expected.txt:
* dom/xhtml/level3/core/nodeisequalnode26-expected.txt:
* fast/dom/Document/clone-node-expected.txt: Added.
* fast/dom/Document/clone-node.html: Added.
* fast/dom/HTMLDocument/clone-node-quirks-mode-expected.txt: Added.
* fast/dom/HTMLDocument/clone-node-quirks-mode.html: Added.
* svg/custom/clone-node-expected.txt: Added.
* svg/custom/clone-node.html: Added.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@160330 268f45cc-cd09-0410-ab3c-d52691b4dbfc