https://bugs.webkit.org/show_bug.cgi?id=115179

Reviewed by Kentaro Hara.

Add support in the bindings generator for Web IDL callback interfaces:
http://dev.w3.org/2006/webapi/WebIDL/#dfn-callback-interface

Drop support for the WebKit-specific [Callback] extended attributes
on Web IDL interfaces and update existing IDL files to use proper
callback interfaces instead.

No new tests, no behavior change.

* Modules/filesystem/EntriesCallback.idl:
* Modules/filesystem/EntryCallback.idl:
* Modules/filesystem/ErrorCallback.idl:
* Modules/filesystem/FileCallback.idl:
* Modules/filesystem/FileSystemCallback.idl:
* Modules/filesystem/FileWriterCallback.idl:
* Modules/filesystem/MetadataCallback.idl:
* Modules/geolocation/PositionCallback.idl:
* Modules/geolocation/PositionErrorCallback.idl:
* Modules/mediastream/NavigatorUserMediaErrorCallback.idl:
* Modules/mediastream/NavigatorUserMediaSuccessCallback.idl:
* Modules/mediastream/RTCErrorCallback.idl:
* Modules/mediastream/RTCSessionDescriptionCallback.idl:
* Modules/mediastream/RTCStatsCallback.idl:
* Modules/notifications/NotificationPermissionCallback.idl:
* Modules/quota/StorageErrorCallback.idl:
* Modules/quota/StorageQuotaCallback.idl:
* Modules/quota/StorageUsageCallback.idl:
* Modules/webaudio/AudioBufferCallback.idl:
* Modules/webdatabase/DatabaseCallback.idl:
* Modules/webdatabase/SQLStatementCallback.idl:
* Modules/webdatabase/SQLStatementErrorCallback.idl:
* Modules/webdatabase/SQLTransactionCallback.idl:
* Modules/webdatabase/SQLTransactionErrorCallback.idl:
* Modules/webdatabase/SQLTransactionSyncCallback.idl:
* bindings/scripts/CodeGeneratorJS.pm:
(GenerateInterface):
* bindings/scripts/IDLParser.pm:
(parseCallbackRestOrInterface):
* bindings/scripts/test/TestCallback.idl:
* dom/RequestAnimationFrameCallback.idl:
* dom/StringCallback.idl:
* html/VoidCallback.idl:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@149113 268f45cc-cd09-0410-ab3c-d52691b4dbfc