Update from https://crrev.com/316786

net/disk_cache/blockfile/backend_impl.cc

 // Copyright (c) 2012 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 "net/disk_cache/blockfile/backend_impl.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/hash.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
-#include "base/metrics/stats_counters.h"
 #include "base/rand_util.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/sys_info.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "net/base/net_errors.h"
 #include "net/disk_cache/blockfile/disk_format.h"
@@ skipping 471 matching lines @@
   Trace("Open hash 0x%x end: 0x%x", hash,
         cache_entry->entry()->address().value());
   CACHE_UMA(AGE_MS, "OpenTime", 0, start);
   CACHE_UMA(COUNTS_10000, "AllOpenBySize.Hit", 0, current_size);
   CACHE_UMA(HOURS, "AllOpenByTotalHours.Hit", 0,
             static_cast<base::HistogramBase::Sample>(total_hours));
   CACHE_UMA(HOURS, "AllOpenByUseHours.Hit", 0,
             static_cast<base::HistogramBase::Sample>(use_hours));
   stats_.OnEvent(Stats::OPEN_HIT);
   web_fonts_histogram::RecordCacheHit(cache_entry);
-  SIMPLE_STATS_COUNTER("disk_cache.hit");
   return cache_entry;
 }
 
 EntryImpl* BackendImpl::CreateEntryImpl(const std::string& key) {
   if (disabled_ || key.empty())
     return NULL;
 
   TimeTicks start = TimeTicks::Now();
   uint32 hash = base::Hash(key);
   Trace("Create hash 0x%x", hash);
@@ skipping 75 matching lines @@
     parent->SetNextAddress(entry_address);
   } else {
     data_->table[hash & mask_] = entry_address.value();
   }
 
   // Link this entry through the lists.
   eviction_.OnCreateEntry(cache_entry.get());
 
   CACHE_UMA(AGE_MS, "CreateTime", 0, start);
   stats_.OnEvent(Stats::CREATE_HIT);
-  SIMPLE_STATS_COUNTER("disk_cache.miss");
   Trace("create entry hit ");
   FlushIndex();
   cache_entry->AddRef();
   return cache_entry.get();
 }
 
 EntryImpl* BackendImpl::OpenNextEntryImpl(Rankings::Iterator* iterator) {
   if (disabled_)
     return NULL;
 
@@ skipping 1470 matching lines @@
     if (total_memory > kMaxBuffersSize || total_memory <= 0)
       total_memory = kMaxBuffersSize;
 
     done = true;
   }
 
   return static_cast<int>(total_memory);
 }
 
 }  // namespace disk_cache