Valgrind: Add/widen suppressions for leaks in IndexedDB. Add suppressions for new memory errors.
Valgrind: Add/widen suppressions for leaks in IndexedDB. Add suppressions for new memory errors.

BUG=122249,122716,122717
TEST=none
TBR=jhawkins
Review URL: https://chromiumcodereview.appspot.com/9960055

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@131499 0039d316-1c4b-4281-b951-d872f2087c98

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