Initial implementation of the ByteStream refactor.

content/browser/download/download_stats.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 "content/browser/download/download_stats.h"
 
 #include "base/metrics/histogram.h"
 #include "base/string_util.h"
 #include "content/browser/download/download_resource_handler.h"
 #include "content/public/browser/download_interrupt_reasons.h"
@@ skipping 237 matching lines @@
 
   // Record the value.
   UMA_HISTOGRAM_ENUMERATION("Download.ContentType",
                             download_content,
                             DOWNLOAD_CONTENT_MAX);
 }
 
 void RecordFileThreadReceiveBuffers(size_t num_buffers) {
     UMA_HISTOGRAM_CUSTOM_COUNTS(
       "Download.FileThreadReceiveBuffers", num_buffers, 1,
-      DownloadResourceHandler::kLoadsToWrite,
-      DownloadResourceHandler::kLoadsToWrite);
+      100, 100);
 }
 
 void RecordBandwidth(double actual_bandwidth, double potential_bandwidth) {
   UMA_HISTOGRAM_CUSTOM_COUNTS(
       "Download.ActualBandwidth", actual_bandwidth, 1, 1000000000, 50);
   UMA_HISTOGRAM_CUSTOM_COUNTS(
       "Download.PotentialBandwidth", potential_bandwidth, 1, 1000000000, 50);
   UMA_HISTOGRAM_PERCENTAGE(
       "Download.BandwidthUsed",
       (int) ((actual_bandwidth * 100)/ potential_bandwidth));
@@ skipping 26 matching lines @@
 }
 
 void RecordOpensOutstanding(int size) {
   UMA_HISTOGRAM_CUSTOM_COUNTS("Download.OpensOutstanding",
                               size,
                               0/*min*/,
                               (1 << 10)/*max*/,
                               64/*num_buckets*/);
 }
 
+void RecordContiguousWriteTime(base::TimeDelta time_blocked) {
+  UMA_HISTOGRAM_TIMES("Download.FileThreadBlockedTime", time_blocked);
+}
+
 void RecordSavePackageEvent(SavePackageEvent event) {
   UMA_HISTOGRAM_ENUMERATION("Download.SavePackage",
                             event,
                             SAVE_PACKAGE_LAST_ENTRY);
 }
 
 }  // namespace download_stats