WebKit API/SPI headers should not use platform #ifdefs. Currently we only declare the SPI functions -[WebDataSource _setAllowToBeMemoryMapped], -[WebDataSource setDataSourceDelegate:], and -[WebDataSource dataSourceDelegate] when building with disk image cache enabled on iOS. Instead we should always declare these functions and provide a trivial implementation for them when building with disk image cache disabled.
<rdar://problem/15275533>
Created attachment 214783 [details] Patch
Committed r157753: <http://trac.webkit.org/changeset/157753>