CTTE: Node::treeScope() should return a reference.
<https://webkit.org/b/122399>

Reviewed by Superlative Sam.

Every Node belongs to a TreeScope. To enforce this, I've made
treeScope() return a TreeScope&, and setTreeScope() now takes a
TreeScope& so there is no way to clear it.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@156981 268f45cc-cd09-0410-ab3c-d52691b4dbfc
FrameSelection: Remove two unused member functions.

Rubber-stamped by Anders Carlsson.

- rootEditableElementOrTreeScopeRootNode()
- rootEditableElementRespectingShadowTree()

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@156982 268f45cc-cd09-0410-ab3c-d52691b4dbfc
run-jsc-stress-tests should be less verbose
https://bugs.webkit.org/show_bug.cgi?id=122397

Reviewed by Sam Weinig.
        
It now just prints something like:
        
 965/1831 ....
        
Where the first number is the number of tests that completed, the second number is the
number of tests total, and the dots are the number of tests running right now - which is
useful towards the end when you're waiting for the last slow tests to finish.
        
It will also print out the output from failing tests and it will print a line for skipped
tests (to annoy you into getting them into a shape where they can be unskipped). For
example, for LayoutTests, it will print just the diff, if the test fails. It's cool.

* Scripts/run-jsc-stress-tests:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@156983 268f45cc-cd09-0410-ab3c-d52691b4dbfc