Linux: Add default implementation for JavaScript alert/confirm/prompt/filechooser dialogs.

git-svn-id: http://chromiumembedded.googlecode.com/svn/trunk/cef1@1029 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
Set SVN properties on gyp_cef.

git-svn-id: http://chromiumembedded.googlecode.com/svn/trunk/cef1@1033 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
Linux: Emit "delete_event" signal instead of calling gtk_widget_destroy (issue #780).

git-svn-id: http://chromiumembedded.googlecode.com/svn/trunk/cef1@1037 5089003a-bbd8-11dd-ad1f-f1f9622dbc98