Add compile asserts for the size of RootInlineBox and InlineTextbox
https://bugs.webkit.org/show_bug.cgi?id=116337

Patch by Lamarque V. Souza <Lamarque.Souza@basyskom.com> on 2013-05-20
Reviewed by Darin Adler.

Add compile asserts to ensure RootInlineBox and InlineTextbox stay small.

* rendering/InlineTextBox.cpp:
(SameSizeAsInlineTextBox):
(WebCore):
* rendering/RootInlineBox.cpp:
(SameSizeAsRootInlineBox):
(WebCore):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150365 268f45cc-cd09-0410-ab3c-d52691b4dbfc