https://bugs.webkit.org/show_bug.cgi?id=102984

Reviewed by Tony Chang.

Source/WebCore:

Now that the transaction "commit" decision is made on the front-end, the back end no-longer
needs to be aware of when individual IDBRequests have dispatched to script or track pending
events (except for preemptive ones like createIndex). This also lets two timers be collapsed
into one which significantly simplifies the code flow in IDBTransactionBackendImpl.

No new tests - just simplification. Exercised by storage/indexeddb/transaction-*.html etc.

* Modules/indexeddb/IDBCursorBackendImpl.cpp:
(WebCore::IDBCursorBackendImpl::prefetchContinueInternal): No more tracking.
(WebCore::IDBCursorBackendImpl::prefetchReset): No more tracking.
* Modules/indexeddb/IDBDatabaseBackendImpl.cpp:
(WebCore::IDBDatabaseBackendImpl::createObjectStoreInternal): No more tracking.
(WebCore::IDBDatabaseBackendImpl::deleteObjectStoreInternal): No more tracking.
* Modules/indexeddb/IDBObjectStoreBackendImpl.cpp:
(WebCore::IDBObjectStoreBackendImpl::setIndexesReadyInternal): No more tracking.
(WebCore::IDBObjectStoreBackendImpl::createIndexInternal): No more tracking.
(WebCore::IDBObjectStoreBackendImpl::deleteIndexInternal): No more tracking.
* Modules/indexeddb/IDBRequest.cpp:
(WebCore::IDBRequest::dispatchEvent): Order must be:
1. request is unregistered from transaction (so request list may be empty)
2. abort transaction if event being dispatched was an error
3. deactivate transaction (which may commit if #1 left it empty and #2 didn't abort)
* Modules/indexeddb/IDBTransactionBackendImpl.cpp:
(WebCore::IDBTransactionBackendImpl::IDBTransactionBackendImpl): Need to track if commit
was requested; previously the front end would have triggered an event timer which, on
completion, would be the signal that the front end was finished.
(WebCore::IDBTransactionBackendImpl::scheduleTask): Schedule a timer to service the new
task, if necessary.
(WebCore::IDBTransactionBackendImpl::abort):
(WebCore::IDBTransactionBackendImpl::hasPendingTasks):
(WebCore::IDBTransactionBackendImpl::commit):
(WebCore::IDBTransactionBackendImpl::taskTimerFired): Picks up "commit" responsibilities
from the now deleted taskEventTimerFired, if everything is truly complete done.
* Modules/indexeddb/IDBTransactionBackendImpl.h:
(IDBTransactionBackendImpl):
* Modules/indexeddb/IDBTransactionBackendInterface.h:
(WebCore::IDBTransactionBackendInterface::didCompleteTaskEvents): Removed from interface.

Source/WebKit/chromium:

Remove now-unused didCompleteTaskEvents() method.

* src/IDBTransactionBackendProxy.cpp:
* src/IDBTransactionBackendProxy.h:
(IDBTransactionBackendProxy):
* src/WebIDBTransactionImpl.cpp:
* src/WebIDBTransactionImpl.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@135927 268f45cc-cd09-0410-ab3c-d52691b4dbfc