Clean up l10ntools xml parser.

-Remove namespaces from header.
-Remove unused members (dbgcnt)
-Remove helpless methods (SetValue, copy ctr and operator,
inherited but not overriden virtual functions)
-Use prefixes for variables
-Use const where it possible
-Remove visual noise
-Correct indentation

Change-Id: I295be484dde157847cd16f260ec70d5cdb5b6fb4

l10ntools/source/helpmerge.cxx

@@ -88,7 +88,7 @@ bool HelpParser::CreatePO(
         printf(
             "%s: %s\n",
             sHelpFile.getStr(),
-            aParser.GetError().sMessage.getStr());
+            aParser.GetError().m_sMessage.getStr());
         exit(-1);
     }
     file->Extract();