[Chromium] Remove unused includes of stdio.h
https://bugs.webkit.org/show_bug.cgi?id=113650

Reviewed by Dimitri Glazkov.

We shouldn't include stdio.h. These includes aren't used anyway.

* src/WebInputEvent.cpp:
* src/x11/WebScreenInfoFactory.cpp:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147285 268f45cc-cd09-0410-ab3c-d52691b4dbfc