Polish the result communication and display of the browsing data counters.

chrome/browser/browsing_data/cache_counter.cc

 // Copyright (c) 2015 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/browsing_data/cache_counter.h"
 #include "chrome/common/pref_names.h"
 #include "components/browsing_data/storage_partition_http_cache_data_remover.h"
 #include "net/base/net_errors.h"
 
 CacheCounter::CacheCounter() : pref_name_(prefs::kDeleteCache),
@@ skipping 22 matching lines @@
   pending_ = true;
 }
 
 void CacheCounter::OnCacheSizeCalculated(int64 result_bytes) {
   pending_ = false;
 
   // A value less than 0 means a net error code.
   if (result_bytes < 0)
     return;
 
-  // The cache size on all three backends (blockfile, simple and memory) is
-  // limited to int32. We are adding together results from several cache
-  // backends, so the result should fit into 32+epsilon bits. Thus,
-  // |result_bytes| / 1024^2 should fit into an int.
-  static const int kBToMb = 1024 * 1024;
-  int result_mb = result_bytes / kBToMb;
-  if (result_bytes % kBToMb)
-    ++result_mb;
-  ReportResult(result_mb);
+  ReportResult(result_bytes);
 }
 
 bool CacheCounter::Pending() {
   return pending_;
 }