Report size of the external memory to V8 in StaticNodeList

When we create a lot of moderately large NodeLists, the V8 GC heuristic
isn't aggressively enough collecting wrappers which can lead to an OOM
crash. Reporting the size of the nodelists to V8 fixes this issue.

The other kinds of nodelists don't have variable sized members, so they
don't have this problem

BUG=315082
TEST=opening PerformanceTests/Parser/query-selector-all-class.html in a release build content shell on a fast computer doesn't crash.
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/64203002

git-svn-id: svn://svn.chromium.org/blink/trunk@161546 bbb929c8-8fbe-4397-9dbb-9b2b20218538