Revert 243291 "[Buildfix] Fix PlatformFileInfo usage in pdf_brow..."

> [Buildfix] Fix PlatformFileInfo usage in pdf_browsertest.cc
> 
> BUG=None
> TBR=thestig@chromium.org
> NOTRY=true
> 
> Review URL: https://codereview.chromium.org/125973003

TBR=tzik@chromium.org

Review URL: https://codereview.chromium.org/126093004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243336 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243336