[Cocoa] Notify the client when a navigation snapshot is taken
Created attachment 234821 [details]
Attachment 234821 [details] did not pass style-queue:
ERROR: Source/WebKit2/UIProcess/Cocoa/NavigationState.h:170: Please declare enum bitfields as unsigned integral types. [runtime/enum_bitfields] 
Total errors found: 1 in 12 files
If any of these errors are false positives, please file a bug against check-webkit-style.
This broke gtk+ build, but it has been fixed in bug #134867