Essentially a revert of https://codereview.chromium.org/1346013005 but
preserving the refactorings in elements.cc which happened in the mean time.

drive-by-fix: pass isolate as argument to more functions in elements.cc.

BUG=v8:4606
LOG=y

Review URL: https://codereview.chromium.org/1543563002

Cr-Commit-Position: refs/heads/master@{#33023}