[Chromium] Move IDBFactoryBackendInterface to WebCore
https://bugs.webkit.org/show_bug.cgi?id=108638

Reviewed by Adam Barth.

Part of a larger refactoring series; see tracking bug 106829.

Source/WebCore:

* Modules/indexeddb/chromium: Added.
* Modules/indexeddb/chromium/IDBFactoryBackendInterfaceChromium.cpp: Added.
(WebCore):
(WebCore::setIDBFactoryBackendInterfaceCreateFunction):
(WebCore::IDBFactoryBackendInterface::create):
* Modules/indexeddb/chromium/IDBFactoryBackendInterfaceChromium.h: Added.
(WebCore):
* WebCore.gyp/WebCore.gyp:
* WebCore.gypi:

Source/WebKit/chromium:

* WebKit.gyp:
* src/AssertMatchingEnums.cpp:
* src/IDBFactoryBackendInterface.cpp: Removed.
* src/IDBFactoryBackendProxy.h:
* src/WebKit.cpp:
(WebKit::initializeWithoutV8):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@141784 268f45cc-cd09-0410-ab3c-d52691b4dbfc