Remove suppression of PointerLockController uninitialized members.

The "conditional jump or move depends on uninitialised value(s)"
error triggered in WebCore::Document::webkitPointerLockElement()
in Valgrind has been fixed in Blink r164898. Removing suppression.

BUG=293049
NOTRY=true

Review URL: https://codereview.chromium.org/134293002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244450 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244450