Re-enable deep query-selector PerformanceTests

Reduce the depth used by PerformanceTests/Parser/
query-selector-deep.html and query-selector-id-deep.html

These performance tests have been disabled since June 2013 as they were
observed to crash "on 6 of the last 9 runs"

BUG=245702

Review-Url: https://codereview.chromium.org/1880383002
Cr-Commit-Position: refs/heads/master@{#403183}
3 files changed