Fine tune const NSClass* presubmit check

Fine tune const NSClass* presubmit check

Blink CL https://codereview.chromium.org/879533003/ defines own
casts to convert between bridged types. The cast helpers in base
cannot be used in Blink. Fine tune the presubmit check to allow
for those by adding a negative look behind for reinterpret_cast.

BUG=

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=294560

[Dominik Röttsches, 2015-03-24 19:42:42]

dominik.rottsches@intel.com changed reviewers:
+ dpranke@google.com, enne@chromium.org, tfarina@chromium.org

[Dominik Röttsches, 2015-03-24 19:42:50]

PTAL

[Dominik Röttsches, 2015-03-24 19:45:25]

dominik.rottsches@intel.com changed reviewers:
+ ben.yan@msn.com, brettw@chromium.org, cpu@chromium.org, jam@chromium.org

[Dirk Pranke, 2015-03-25 01:26:40]

dpranke@chromium.org changed reviewers:
+ dpranke@chromium.org

[Dirk Pranke, 2015-03-25 01:26:40]

lgtm

[Dominik Röttsches, 2015-03-25 06:21:07]

The CQ bit was checked by dominik.rottsches@intel.com

[commit-bot: I haz the power, 2015-03-25 06:21:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1034523003/1

[commit-bot: I haz the power, 2015-03-25 06:24:24]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-03-25 06:24:25]

Presubmit check for 1034523003-1 failed and returned exit status 1.

Running presubmit commit checks ...
Checking out rietveld...
Running save-description-on-failure.sh
Running push-basic.sh
Running upstream.sh
Running submit-from-new-dir.sh
Running abandon.sh
Running submodule-merge-test.sh
Running upload-local-tracking-branch.sh
Running hooks.sh
Running post-dcommit-hook-test.sh
Running upload-stale.sh
Running patch.sh
Running basic.sh

** Presubmit ERRORS **
Pylint (114 files) (133.76s) failed
************* Module presubmit_canned_checks
C:951, 0: Line too long (82/80) (line-too-long)


Presubmit checks took 184.6s to calculate.

[Dominik Röttsches, 2015-03-25 07:32:44]

The CQ bit was checked by dominik.rottsches@intel.com

[Dominik Röttsches, 2015-03-25 07:32:44]

The patchset sent to the CQ was uploaded after l-g-t-m from dpranke@chromium.org
Link to the patchset: https://codereview.chromium.org/1034523003/#ps20001
(title: "Split regex line")

[commit-bot: I haz the power, 2015-03-25 07:32:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1034523003/20001

[commit-bot: I haz the power, 2015-03-25 07:36:07]

Committed patchset #2 (id:20001) as
http://src.chromium.org/viewvc/chrome?view=rev&revision=294560