Reverting 7296.
Reverting 7296.

From http://build.chromium.org/buildbot/waterfall/waterfall?builder=Chromium%20Reliability
There is a clear increase of crashes after this change. It really seems like a heap overflow but it's hard to tell. Reverting to see if it helps the reliability tests. If not, we can reapply this change and find another culprit.
Review URL: http://codereview.chromium.org/15081

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@7304 0039d316-1c4b-4281-b951-d872f2087c98

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