Fix display and progressive disclosure for multi-line values in about:policy.

chrome/browser/policy/policy_error_map.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/policy/policy_error_map.h"
 
 #include <utility>
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 39 matching lines @@
                               const std::string& replacement) {
   AddError(PendingError(policy, message_id, ASCIIToUTF16(replacement)));
 }
 
 string16 PolicyErrorMap::GetErrors(ConfigurationPolicyType policy) {
   CheckReadyAndConvert();
   std::pair<const_iterator, const_iterator> range = map_.equal_range(policy);
   std::vector<string16> list;
   for (const_iterator it = range.first; it != range.second; ++it)
     list.push_back(it->second);
-  return JoinString(list, ' ');
+  return JoinString(list, '\n');
 }
 
 bool PolicyErrorMap::empty() {
   CheckReadyAndConvert();
   return map_.empty();
 }
 
 size_t PolicyErrorMap::size() {
   CheckReadyAndConvert();
   return map_.size();
@@ skipping 33 matching lines @@
 
 void PolicyErrorMap::CheckReadyAndConvert() {
   DCHECK(IsReady());
   for (size_t i = 0; i < pending_.size(); ++i) {
     Convert(pending_[i]);
   }
   pending_.clear();
 }
 
 }  // namespace policy