SYNCIDB: Shared worker fixes.

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rename : dom/workers/test/syncidb_sharedWorker_sharedWorker.js => dom/workers/test/indexedDB/syncidb_sharedWorker_sharedWorker.js
rename : dom/workers/test/syncidb_worker_worker.js => dom/workers/test/indexedDB/syncidb_worker_worker.js
rename : dom/workers/test/test_syncidb_sharedWorker.html => dom/workers/test/indexedDB/test_syncidb_sharedWorker.html
rename : dom/workers/test/test_syncidb_worker.html => dom/workers/test/indexedDB/test_syncidb_worker.html