Types for m_maximumAge and m_timeout in PositionOptions class should be changed

Types of m_maximumAge and m_imeout are "unsigned long"
but they are "int". Therefore their types should change to
"unsigned" for align with others.

BUG=368184

Review URL: https://codereview.chromium.org/336213002

git-svn-id: svn://svn.chromium.org/blink/trunk@176266 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Prepare SVGElement references in Document for oilpan

BUG=357163

Review URL: https://codereview.chromium.org/333413006

git-svn-id: svn://svn.chromium.org/blink/trunk@176267 bbb929c8-8fbe-4397-9dbb-9b2b20218538