Have window.indexedDB.deleteDatabase return an IDBOpenDBRequest.

Have window.indexedDB.deleteDatabase return an IDBOpenDBRequest.
https://bugs.webkit.org/show_bug.cgi?id=149229

Reviewed by Alex Christensen.

Source/WebCore:

Test: storage/indexeddb/modern/deletedatabase-request.html
      storage/indexeddb/modern/deletedatabase-null-name-exception.html

* CMakeLists.txt:
* WebCore.xcodeproj/project.pbxproj:

* Modules/indexeddb/IDBDatabaseIdentifier.cpp: Added.
(WebCore::IDBDatabaseIdentifier::IDBDatabaseIdentifier):
* Modules/indexeddb/IDBDatabaseIdentifier.h: Added.
(WebCore::IDBDatabaseIdentifier::IDBDatabaseIdentifier):
(WebCore::IDBDatabaseIdentifier::isHashTableDeletedValue):
(WebCore::IDBDatabaseIdentifier::hash):
(WebCore::IDBDatabaseIdentifier::isValid):
(WebCore::IDBDatabaseIdentifier::operator==):
(WebCore::IDBDatabaseIdentifier::databaseName):
(WebCore::IDBDatabaseIdentifierHash::hash):
(WebCore::IDBDatabaseIdentifierHash::equal):
(WebCore::IDBDatabaseIdentifierHashTraits::isEmptyValue):

* Modules/indexeddb/client/IDBFactoryImpl.cpp:
(WebCore::IDBClient::shouldThrowSecurityException):
(WebCore::IDBClient::IDBFactory::getDatabaseNames):
(WebCore::IDBClient::IDBFactory::open):
(WebCore::IDBClient::IDBFactory::deleteDatabase):
* Modules/indexeddb/client/IDBFactoryImpl.h:

* Modules/indexeddb/client/IDBOpenDBRequestImpl.cpp: Copied from Source/WebCore/Modules/indexeddb/client/IDBFactoryImpl.cpp.
(WebCore::IDBClient::IDBOpenDBRequest::IDBOpenDBRequest):
* Modules/indexeddb/client/IDBOpenDBRequestImpl.h: Copied from Source/WebCore/Modules/indexeddb/client/IDBFactoryImpl.cpp.
(WebCore::IDBClient::IDBOpenDBRequest::create):

* Modules/indexeddb/client/IDBRequestImpl.cpp: Copied from Source/WebCore/Modules/indexeddb/client/IDBFactoryImpl.cpp.
(WebCore::IDBClient::IDBRequest::IDBRequest):
(WebCore::IDBClient::IDBRequest::result):
(WebCore::IDBClient::IDBRequest::errorCode):
(WebCore::IDBClient::IDBRequest::error):
(WebCore::IDBClient::IDBRequest::source):
(WebCore::IDBClient::IDBRequest::transaction):
(WebCore::IDBClient::IDBRequest::readyState):
(WebCore::IDBClient::IDBRequest::eventTargetInterface):
(WebCore::IDBClient::IDBRequest::activeDOMObjectName):
(WebCore::IDBClient::IDBRequest::canSuspendForPageCache):
* Modules/indexeddb/client/IDBRequestImpl.h: Copied from Source/WebCore/Modules/indexeddb/client/IDBFactoryImpl.h.

* platform/Logging.h:

Source/WebKit/mac:

* WebView/WebView.mm:
(-[WebView _preferencesChanged:]): Enable IDB in WK1.

LayoutTests:

* platform/mac-wk1/TestExpectations:
* platform/wk2/TestExpectations:
* storage/indexeddb/modern/deletedatabase-null-name-exception-expected.txt: Added.
* storage/indexeddb/modern/deletedatabase-null-name-exception.html: Added.
* storage/indexeddb/modern/deletedatabase-request-expected.txt: Added.
* storage/indexeddb/modern/deletedatabase-request.html: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@189879 268f45cc-cd09-0410-ab3c-d52691b4dbfc