Exclude InvalidationNotifier unit tests from heapcheck bots.
Exclude InvalidationNotifier unit tests from heapcheck bots.

Every ten builds or so we get a massive leak list, and I believe it's
related to these tests.

BUG=118203
TBR=akalin@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9857012

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@128911 0039d316-1c4b-4281-b951-d872f2087c98

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