Mac WebKit2 rebaselines.

Partially revert http://trac.webkit.org/changeset/143709 since the expected result for
cross-origin-local-storage-wk1-expected.txt is different on Mac WebKit on the contrary to
the change log description in the changeset.

Also skip editing/spelling/spelling-changed-text.html on Mac since the test requires
the support for asynchronous spellchecking.

* platform/mac-wk2/http/tests/security/cross-origin-local-storage-wk1-expected.txt: Copied
    from platform/mac/http/tests/security/cross-origin-local-storage-wk1-expected.txt.
* platform/mac/TestExpectations:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@143779 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Unreviewed GTK gardening.

Removed expectations for tests that now pass. Adjusted an expectation for a flaky crasher.
Marked a few more sputnik tests as slow.

* platform/gtk-wk1/TestExpectations:
* platform/gtk/TestExpectations:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@143780 268f45cc-cd09-0410-ab3c-d52691b4dbfc