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    [Shadow] parentTreeScope() of nested shadow DOM subtree returns document(). · da0060a4
    commit-queue@webkit.org authored
    https://bugs.webkit.org/show_bug.cgi?id=89172
    
    Patch by Takashi Sakamoto <tasak@google.com> on 2012-06-22
    Reviewed by Hajime Morita.
    
    Source/WebCore:
    
    Added setParentTreeScope to set parent treescope of shadow root to be
    host's treescope in ElementShadow::addShadowRoot.
    
    Test: fast/dom/shadow/parent-tree-scope-in-shadow.html
    
    * dom/ElementShadow.cpp:
    (WebCore::ElementShadow::addShadowRoot):
    Added setParentTreeScope.
    * testing/Internals.cpp:
    (WebCore::Internals::parentTreeScope):
    Newly added. This method returns a parent tree scope's root node of
    a given node, because a tree scope's root node is either document node
    or shadow root node and both nodes derive from TreeScope. So root nodes
    are treated as TreeScope.
    * testing/Internals.h:
    (Internals):
    * testing/Internals.idl:
    Added parentTreeScope.
    
    LayoutTests:
    
    * fast/dom/shadow/parent-tree-scope-in-shadow-expected.txt: Added.
    * fast/dom/shadow/parent-tree-scope-in-shadow.html: Added.
    
    git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121027 268f45cc-cd09-0410-ab3c-d52691b4dbfc
    da0060a4