Browsing Khmer translation

note: 'Label for the Remove host button.'
note: 'Text for the button used to confirm the dialog asking if they would like to proceed with deletion.'
note: 'Text for the uninstall button on the extension uninstall prompt'
note: 'The label for the remove button when editing bookmarks.'
note: 'The label for uninstalling an extension.'
in: results/cr/chrome/app/generated_resources.grd, as IDS_HISTORY_DELETE_PRIOR_VISITS_CONFIRM_BUTTON
in: results/cr/chrome/app/generated_resources.grd, as IDS_EXTENSIONS_REMOVE