Indexed DB: Remove nonstandard IDBFactory.webkitGetDatabaseNames()

third_party/WebKit/LayoutTests/storage/indexeddb/factory-basics-expected.txt

-CONSOLE WARNING: line 1: indexedDB.webkitGetDatabaseNames() is deprecated and will be removed in M60, around August 2017. See https://www.chromestatus.com/features/5725741740195840 for more details.
-Test the basics of IndexedDB's IDBFactory.
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-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
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-PASS typeof indexedDB.open is "function"
-PASS typeof indexedDB.cmp is "function"
-PASS typeof indexedDB.deleteDatabase is "function"
-PASS typeof indexedDB.webkitGetDatabaseNames is "function"
-PASS typeof indexedDB.getDatabaseNames is "undefined"
-request = indexedDB.webkitGetDatabaseNames()
-PASS request.source is null
-databaseNames = event.target.result
-PASS databaseNames.contains('storage/indexeddb/factory-basics') is false
-PASS databaseNames.contains('DATABASE THAT DOES NOT EXIST') is false
-request = indexedDB.open(name)
-PASS request.source is null
-event.target.result.close()
-indexedDB.webkitGetDatabaseNames()
-databaseNames = event.target.result
-PASS databaseNames.contains('storage/indexeddb/factory-basics') is true
-PASS databaseNames.contains('DATABASE THAT DOES NOT EXIST') is false
-request = indexedDB.deleteDatabase('storage/indexeddb/factory-basics')
-PASS request.source is null
-indexedDB.webkitGetDatabaseNames()
-databaseNames = event.target.result
-PASS databaseNames.contains('storage/indexeddb/factory-basics') is false
-PASS databaseNames.contains('DATABASE THAT DOES NOT EXIST') is false
-indexedDB.deleteDatabase('DATABASE THAT DOES NOT EXIST')
-PASS successfullyParsed is true
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-TEST COMPLETE
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