DevTools: Speed-up Object.values.
DevTools: Speed-up Object.values.

The current version is 20% slower than it could be.
Also it produces garbage.

BUG=none
TEST=LayoutTests/inspector/*
R=yurys@chromium.org

Review URL: https://codereview.chromium.org/16881012

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@152710 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs