views: Remove unused windows files.

Most of the _win files are now excluded from the build on windows. So remove
them from the tree. Also remove the only remaining instance of USE_AURA in views.

BUG=343577
R=sky@chromium.org

Review URL: https://codereview.chromium.org/195803002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256423 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256423
Use PEImage in ntdll_cache.cc

Use the exported functions iterator in PEImage instead of writing our
own.

BUG=

Review URL: https://codereview.chromium.org/192933003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256424 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256424