convert svtools/source/contnr/contentenumation.hxx from String to OUString

Change-Id: I1cdf67cd31ae65543bd27ce5cfc195daf12d0fc2

svtools/source/contnr/contentenumeration.cxx

@@ -132,7 +132,7 @@ namespace svt
         m_aFolder = _rFolder;
         m_pResultHandler = _pResultHandler;
 
-        OSL_ENSURE( m_aFolder.aContent.get().is() || m_aFolder.sURL.Len(),
+        OSL_ENSURE( m_aFolder.aContent.get().is() || !m_aFolder.sURL.isEmpty(),
             "FileViewContentEnumerator::enumerateFolderContent: invalid folder descriptor!" );
 
         launch();

svtools/source/contnr/contentenumeration.hxx

@@ -148,7 +148,7 @@ namespace svt
         ::ucbhelper::Content  aContent;
         /** the URL of a folder. Will be ignored if <member>aContent</member> is not <NULL/>.
         */
-        String          sURL;
+        OUString          sURL;
 
         FolderDescriptor() { }
 
@@ -157,7 +157,7 @@ namespace svt
         {
         }
 
-        FolderDescriptor( const String& _rURL )
+        FolderDescriptor( const OUString& _rURL )
             :sURL( _rURL )
         {
         }