Remove calls to deprecated V8 APIs in JavaScriptCallFrame.cpp

BUG=324225
R=marja@chromium.org
TBR=jochen@chromium.org, marja@chromium.org

Review URL: https://codereview.chromium.org/95503002

git-svn-id: svn://svn.chromium.org/blink/trunk@162853 bbb929c8-8fbe-4397-9dbb-9b2b20218538