Unreviewed, touch testing/Internals.idl to try to fix Windows EWS after r174315.

* testing/Internals.idl: Remove unnecessary whitespaces.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@174344 268f45cc-cd09-0410-ab3c-d52691b4dbfc
AX: Performance: Certain Web site causes Safari to hang completely while entering form data
https://bugs.webkit.org/show_bug.cgi?id=137420

Reviewed by Mario Sanchez Prada.

If a website has multiple nested tables that are not "accessibility" tables, the performance of accessibility slows to a crawl because:
  1) We are re-computing accessibilityIsIgnored many times.
       As a solution, we can enable the isIgnoredCache when updating children.
  2) When asking if an object isTableCell, we'd go up the parent chain, asking each of those parents the same question, which exploded into calling this many times.
      As a solution, I've changed our determination of isTableCell to instead check if the parent is an accessibiltyTable which should be much faster.

No new functionality. Existing tests cover changes.

* accessibility/AccessibilityObject.cpp:
(WebCore::AccessibilityObject::updateChildrenIfNecessary):
(WebCore::AccessibilityObject::accessibilityIsIgnored):
* accessibility/AccessibilityTableCell.cpp:
(WebCore::AccessibilityTableCell::parentTable):
(WebCore::AccessibilityTableCell::isTableCell):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@174345 268f45cc-cd09-0410-ab3c-d52691b4dbfc