Add missing init calls in texture-size tests in 1.0.1 and reduce timeouts

These tests are asynchronous, but didn't call waitUntilDone correctly in
1.0.1 when run under the webkit test runner. Add the missing call. The
100 ms timeouts in these tests are also needlessly long and simply slow
down test execution, so fix that in 1.0.3+ versions of the test suite.