Revert of Update V8 to version 3.29.35 (based on bleeding_edge revision...

Revert of Update V8 to version 3.29.35 (based on bleeding_edge revision r23537). (patchset #1 id:1 of https://codereview.chromium.org/530683003/)

Reason for revert:
This makes DevTools in device mode crash silently (crbug.com/409604).

Original issue's description:
> Update V8 to version 3.29.35 (based on bleeding_edge revision r23537).
>
> TBR=jarin@chromium.org
>
> Committed: https://chromium.googlesource.com/chromium/src/+/5c3fee7d50d3f5984d4462fef9cfce694e1ae8a9

TBR=jarin@chromium.org,machenbach@chromium.org
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/530763002

Cr-Commit-Position: refs/heads/master@{#292864}

DEPS

@@ -43,7 +43,7 @@ vars = {
   # the commit queue can handle CLs rolling Skia
   # and V8 without interference from each other.
   'v8_branch': 'trunk',
-  'v8_revision': 'd4f11c0cf476dd854eaebec1cbacb1afc7bea18e', # from svn revision 23539
+  'v8_revision': 'd71b62088ad094b1187c06c92d1f27fab56aaddb', # from svn revision 23496
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling WebRTC
   # and V8 without interference from each other.