Use string for Histogram names since these are all ASCII anyway wide-characte...

chrome/browser/net/dns_master.cc

 // Copyright (c) 2006-2008 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/net/dns_master.h"
 
 #include <algorithm>
 #include <set>
 #include <sstream>
 
@@ skipping 86 matching lines @@
 
 bool DnsMaster::AccruePrefetchBenefits(const GURL& referrer,
                                       DnsHostInfo* navigation_info) {
   std::string hostname = navigation_info->hostname();
 
   AutoLock auto_lock(lock_);
   Results::iterator it = results_.find(hostname);
   if (it == results_.end()) {
     // Remain under lock to assure static HISTOGRAM constructor is safely run.
     // Use UMA histogram to quantify potential future gains here.
-    UMA_HISTOGRAM_LONG_TIMES(L"DNS.UnexpectedResolutionL",
+    UMA_HISTOGRAM_LONG_TIMES("DNS.UnexpectedResolutionL",
                              navigation_info->resolve_duration());
     navigation_info->DLogResultsStats("DNS UnexpectedResolution");
 
     NonlinkNavigation(referrer, navigation_info);
     return false;
   }
   DnsHostInfo& prefetched_host_info(it->second);
 
   // Sometimes a host is used as a subresource by several referrers, so it is
   // in our list, but was never motivated by a page-link-scan.  In that case, it
@@ skipping 374 matching lines @@
     Value* subresource_list;
     if (!motivating_host->Get(1, &subresource_list))
       continue;
     if (motivating_referrer.empty())
       continue;
     referrers_[motivating_referrer].Deserialize(*subresource_list);
   }
 }
 
 }  // namespace chrome_browser_net