Work around assertion failure when child process crashes by updating inherited copy of handle from ChildProcessInfo when child dies.
Work around assertion failure when child process crashes by updating
inherited copy of handle from ChildProcessInfo when child dies.

BUG=88769
TEST=none (manually ran steps in bug report)
Review URL: http://codereview.chromium.org/7327022

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@91924 0039d316-1c4b-4281-b951-d872f2087c98

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