Valgrind: Disable two tests that are timing out in ChromiumOS.
Valgrind: Disable two tests that are timing out in ChromiumOS.

BUG=85865,85866
TEST=none
TBR=thestig

Review URL: http://codereview.chromium.org/7003137

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@88794 0039d316-1c4b-4281-b951-d872f2087c98

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