IndexedDB 2.0: Queue up completed requests in the client, handle them one by one.

IndexedDB 2.0: Queue up completed requests in the client, handle them one by one.
https://bugs.webkit.org/show_bug.cgi?id=165000

Reviewed by Alex Christensen.

Source/WebCore:

No new tests (Covered extensively by every existing test).

Currently when a TransactionOperation completes on the server, it immediately completes
itself on the client side, including scheduling an event dispatch if necessary.

This patch changes it so that "server completed operations" instead queue up in the
IDBTransaction and are "client-side completed" asynchronously, 1-by-1.

Currently this is a "no behavior change" because only one operation is ever sent to
the server at a time.

But that will change with https://webkit.org/b/164932
And this patch is a pre-requisite for that.

* Modules/indexeddb/IDBRequest.cpp:
(WebCore::IDBRequest::dispatchEvent):
(WebCore::IDBRequest::didOpenOrIterateCursor):
(WebCore::IDBRequest::completeRequestAndDispatchEvent):
(WebCore::IDBRequest::requestCompleted): Deleted.
* Modules/indexeddb/IDBRequest.h:

* Modules/indexeddb/IDBTransaction.cpp:
(WebCore::IDBTransaction::IDBTransaction):
(WebCore::IDBTransaction::internalAbort):
(WebCore::IDBTransaction::abortOnServerAndCancelRequests):
(WebCore::IDBTransaction::scheduleOperation):
(WebCore::IDBTransaction::schedulePendingOperationTimer):
(WebCore::IDBTransaction::pendingOperationTimerFired):
(WebCore::IDBTransaction::operationCompletedOnServer):
(WebCore::IDBTransaction::scheduleCompletedOperationTimer):
(WebCore::IDBTransaction::completedOperationTimerFired):
(WebCore::IDBTransaction::completeNoncursorRequest):
(WebCore::IDBTransaction::completeCursorRequest):
(WebCore::IDBTransaction::finishedDispatchEventForRequest):
(WebCore::IDBTransaction::didStart):
(WebCore::IDBTransaction::didOpenCursorOnServer):
(WebCore::IDBTransaction::didIterateCursorOnServer):
(WebCore::IDBTransaction::didGetAllRecordsOnServer):
(WebCore::IDBTransaction::didGetRecordOnServer):
(WebCore::IDBTransaction::didGetCountOnServer):
(WebCore::IDBTransaction::didDeleteRecordOnServer):
(WebCore::IDBTransaction::didClearObjectStoreOnServer):
(WebCore::IDBTransaction::putOrAddOnServer):
(WebCore::IDBTransaction::didPutOrAddOnServer):
(WebCore::IDBTransaction::operationCompletedOnClient):
(WebCore::IDBTransaction::deactivate):
(WebCore::IDBTransaction::connectionClosedFromServer):
(WebCore::IDBTransaction::scheduleOperationTimer): Deleted.
(WebCore::IDBTransaction::operationTimerFired): Deleted.
(WebCore::IDBTransaction::operationDidComplete): Deleted.
* Modules/indexeddb/IDBTransaction.h:

* Modules/indexeddb/client/IDBConnectionProxy.cpp:
(WebCore::IDBClient::IDBConnectionProxy::completeOperation):

* Modules/indexeddb/client/TransactionOperation.cpp:
(WebCore::IDBClient::TransactionOperation::TransactionOperation):
* Modules/indexeddb/client/TransactionOperation.h:
(WebCore::IDBClient::TransactionOperation::transitionToCompleteOnThisThread):
(WebCore::IDBClient::TransactionOperation::transitionToComplete):
(WebCore::IDBClient::TransactionOperation::doComplete):
(WebCore::IDBClient::TransactionOperation::idbRequest):
(WebCore::IDBClient::TransactionOperation::performCompleteOnOriginThread): Deleted.
(WebCore::IDBClient::TransactionOperation::completed): Deleted.

LayoutTests:

* storage/indexeddb/modern/resources/transaction-scheduler-6.js: This test had a bug which was masked by previously
  synchronous behavior. Fix that bug!

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@209069 268f45cc-cd09-0410-ab3c-d52691b4dbfc