For concurrent recompilation we created the CompilationHandleScope after
the CanonicalHandleScope, which basically disabled the canonicalization
because the deferred handle creation doesn't pay attention to the
canonicalization mode then. This meant that we did not canonicalize
handles properly as soon as concurrent recompilation was enabled.

R=jarin@chromium.org
BUG=v8:5267

Review-Url: https://codereview.chromium.org/2276953004
Cr-Commit-Position: refs/heads/master@{#38882}