leveldb: Moved to LevelDBEnv.IOError.BFE histogram entries.

content/browser/indexed_db/leveldb/leveldb_database.cc

 // Copyright (c) 2013 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 "content/browser/indexed_db/leveldb/leveldb_database.h"
 
 #include <cerrno>
 
 #include "base/basictypes.h"
 #include "base/files/file.h"
@@ skipping 186 matching lines @@
   method_histogram_name.append(".EnvMethod");
   base::LinearHistogram::FactoryGet(
       method_histogram_name,
       1,
       leveldb_env::kNumEntries,
       leveldb_env::kNumEntries + 1,
       base::HistogramBase::kUmaTargetedHistogramFlag)->Add(method);
 
   std::string error_histogram_name(histogram_name);
 
-  if (result == leveldb_env::METHOD_AND_PFE) {
+  if (result == leveldb_env::METHOD_AND_BFE) {
     DCHECK_LT(error, 0);
-    error_histogram_name.append(std::string(".PFE.") +
+    error_histogram_name.append(std::string(".BFE.") +
                                 leveldb_env::MethodIDToString(method));
     base::LinearHistogram::FactoryGet(
         error_histogram_name,
         1,
         -base::File::FILE_ERROR_MAX,
         -base::File::FILE_ERROR_MAX + 1,
         base::HistogramBase::kUmaTargetedHistogramFlag)->Add(-error);
   }
 }
 
@@ skipping 205 matching lines @@
   const leveldb::Slice start_slice = MakeSlice(start);
   const leveldb::Slice stop_slice = MakeSlice(stop);
   // NULL batch means just wait for earlier writes to be done
   db_->Write(leveldb::WriteOptions(), NULL);
   db_->CompactRange(&start_slice, &stop_slice);
 }
 
 void LevelDBDatabase::CompactAll() { db_->CompactRange(NULL, NULL); }
 
 }  // namespace content