Web Inspector: IndexedDBModel should keep track of requests sent to the backend.

Web Inspector: IndexedDBModel should keep track of requests sent to the backend.
https://bugs.webkit.org/show_bug.cgi?id=76705

Reviewed by Pavel Feldman.

* inspector/Inspector.json:
* inspector/InspectorIndexedDBAgent.cpp:
(WebCore::InspectorIndexedDBAgent::requestDatabaseNamesForFrame):
* inspector/InspectorIndexedDBAgent.h:
* inspector/front-end/IndexedDBModel.js:
(WebInspector.IndexedDBModel):
(WebInspector.IndexedDBModel.prototype._frameDetached):
(WebInspector.IndexedDBModel.prototype._reset):
(WebInspector.IndexedDBModel.prototype._loadDatabaseNamesForFrame):
(WebInspector.IndexedDBRequestManager):
(WebInspector.IndexedDBRequestManager.prototype.requestDatabaseNamesForFrame.innerCallback):
(WebInspector.IndexedDBRequestManager.prototype.requestDatabaseNamesForFrame):
(WebInspector.IndexedDBRequestManager.prototype._databaseNamesLoaded):
(WebInspector.IndexedDBRequestManager.prototype._requestId):
(WebInspector.IndexedDBRequestManager.prototype._frameDetached):
(WebInspector.IndexedDBRequestManager.prototype._reset):
(WebInspector.IndexedDBRequestManager.DatabasesForFrameRequest):
(WebInspector.IndexedDBDispatcher):
(WebInspector.IndexedDBDispatcher.prototype.databaseNamesLoaded):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@105621 268f45cc-cd09-0410-ab3c-d52691b4dbfc