Merge IDBCursorBackendInterface and IDBCursorBackendImpl

Merge IDBCursorBackendInterface and IDBCursorBackendImpl
https://bugs.webkit.org/show_bug.cgi?id=124068

Reviewed by Anders Carlsson.

Source/WebCore:

* CMakeLists.txt:
* GNUmakefile.list.am:
* WebCore.xcodeproj/project.pbxproj:

* Modules/indexeddb/IDBCursorBackendInterface.h: Removed.

* Modules/indexeddb/IDBCursorBackend.cpp: Renamed from Source/WebCore/Modules/indexeddb/IDBCursorBackendImpl.cpp.
* Modules/indexeddb/IDBCursorBackend.h: Renamed from Source/WebCore/Modules/indexeddb/IDBCursorBackendImpl.h.

* Modules/indexeddb/IDBCallbacks.h:
* Modules/indexeddb/IDBCursor.cpp:
* Modules/indexeddb/IDBCursor.h:
* Modules/indexeddb/IDBCursorWithValue.cpp:
* Modules/indexeddb/IDBCursorWithValue.h:
* Modules/indexeddb/IDBDatabaseBackendImpl.cpp:
* Modules/indexeddb/IDBFactoryBackendInterface.h:
* Modules/indexeddb/IDBRequest.cpp:
* Modules/indexeddb/IDBRequest.h:
* Modules/indexeddb/IDBTransactionBackendImpl.cpp:
* Modules/indexeddb/IDBTransactionBackendImpl.h:
* Modules/indexeddb/IDBTransactionBackendInterface.h:
* Modules/indexeddb/IDBTransactionBackendOperations.cpp:
* Modules/indexeddb/leveldb/IDBFactoryBackendLevelDB.cpp:
* Modules/indexeddb/leveldb/IDBFactoryBackendLevelDB.h:

Source/WebKit2:

* WebProcess/Databases/IndexedDB/WebIDBFactoryBackend.cpp:
(WebKit::WebIDBFactoryBackend::createCursorBackend):
* WebProcess/Databases/IndexedDB/WebIDBFactoryBackend.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@158959 268f45cc-cd09-0410-ab3c-d52691b4dbfc