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

chrome/browser/history/history_backend.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/history/history_backend.h"
 
 #include <set>
 
 #include "base/compiler_specific.h"
 #include "base/file_util.h"
@@ skipping 549 matching lines @@
   if (thumbnail_db_.get())
     thumbnail_db_->BeginTransaction();
   if (archived_db_.get())
     archived_db_->BeginTransaction();
   if (text_database_.get())
     text_database_->BeginTransaction();
 
   // Start expiring old stuff.
   expirer_.StartArchivingOldStuff(TimeDelta::FromDays(kArchiveDaysThreshold));
 
-  HISTOGRAM_TIMES(L"History.InitTime",
+  HISTOGRAM_TIMES("History.InitTime",
                   TimeTicks::Now() - beginning_time);
 }
 
 std::pair<URLID, VisitID> HistoryBackend::AddPageVisit(
     const GURL& url,
     Time time,
     VisitID referring_visit,
     PageTransition::Type transition) {
   // Top-level frame navigations are visible, everything else is hidden
   bool new_hidden = !PageTransition::IsMainFrame(transition);
@@ skipping 409 matching lines @@
       //     expirer_.GetCurrentArchiveTime() - TimeDelta::FromDays(7)) {
     } else {
       // Full text history query.
       QueryHistoryFTS(text_query, options, &request->value);
     }
   }
 
   request->ForwardResult(QueryHistoryRequest::TupleType(request->handle(),
                                                         &request->value));
 
-  HISTOGRAM_TIMES(L"History.QueryHistory",
+  HISTOGRAM_TIMES("History.QueryHistory",
                   TimeTicks::Now() - beginning_time);
 }
 
 // Basic time-based querying of history.
 void HistoryBackend::QueryHistoryBasic(URLDatabase* url_db,
                                        VisitDatabase* visit_db,
                                        const QueryOptions& options,
                                        QueryResults* result) {
   // First get all visits.
   VisitVector visits;
@@ skipping 213 matching lines @@
 
     // In this rare case, we start to mine the older redirect sessions
     // from the visit table to try to find a thumbnail.
     if (!success) {
       success = GetThumbnailFromOlderRedirect(page_url, &(*data)->data);
     }
 
     if (!success)
       *data = NULL;  // This will tell the callback there was an error.
 
-    HISTOGRAM_TIMES(L"History.GetPageThumbnail",
+    HISTOGRAM_TIMES("History.GetPageThumbnail",
                     TimeTicks::Now() - beginning_time);
   }
 }
 
 bool HistoryBackend::GetThumbnailFromOlderRedirect(
     const GURL& page_url,
     std::vector<unsigned char>* data) {
   // Look at a few previous visit sessions.
   VisitVector older_sessions;
   URLID page_url_id = db_->GetRowForURL(page_url, NULL);
@@ skipping 145 matching lines @@
     data = new RefCountedBytes;
     Time last_updated;
     if (db_->GetRowForURL(page_url, &url_info) && url_info.favicon_id() &&
         thumbnail_db_->GetFavIcon(url_info.favicon_id(), &last_updated,
                                   &data->data, &icon_url)) {
       know_favicon = true;
       expired = (Time::Now() - last_updated) >
           TimeDelta::FromDays(kFavIconRefetchDays);
     }
 
-    HISTOGRAM_TIMES(L"History.GetFavIconForURL",
+    HISTOGRAM_TIMES("History.GetFavIconForURL",
                     TimeTicks::Now() - beginning_time);
   }
 
   request->ForwardResult(
       GetFavIconRequest::TupleType(request->handle(), know_favicon, data,
                                    expired, icon_url));
 }
 
 void HistoryBackend::SetFavIcon(
     const GURL& page_url,
@@ skipping 413 matching lines @@
   return true;
 }
 
 BookmarkService* HistoryBackend::GetBookmarkService() {
   if (bookmark_service_)
     bookmark_service_->BlockTillLoaded();
   return bookmark_service_;
 }
 
 }  // namespace history
-