Suppress more std::string false leaks and leaks below history::ExpireHistoryBackend::DoExpireHistoryIndexFiles BUG=76386,86481 TBR=glider Review URL: http://codereview.chromium.org/7201003
Suppress more std::string false leaks and leaks below history::ExpireHistoryBackend::DoExpireHistoryIndexFiles
BUG=76386,86481
TBR=glider
Review URL: http://codereview.chromium.org/7201003

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@89474 0039d316-1c4b-4281-b951-d872f2087c98

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