FileMapping simplified to use only one type of entries.
Added start/stopBatchUpdates to FileSystemWorkspaceProvider for better TabbedPane performance.
Added fileSystemProject experiment for file system support and (early and ugly) file system mappings editor behind this experiment.
Created attachment 183203 [details]
Created attachment 183204 [details]
Created attachment 183205 [details]
Attachment 183204 [details] did not pass style-queue:
Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'LayoutTests/ChangeLog', u'LayoutTests/insp..." exit_code: 1
Source/WebCore/inspector/front-end/Images/addIcon.png:0: Have to enable auto props in the subversion config file (/home/alancutter/.subversion/config "enable-auto-props = yes"). Have to set the svn:mime-type in the subversion config file (/home/alancutter/.subversion/config "*.png = svn:mime-type=image/png"). [image/png] 
Total errors found: 1 in 12 files
If any of these errors are false positives, please file a bug against check-webkit-style.
Committed r140124: <http://trac.webkit.org/changeset/140124>