Remove a superfluous DCHECK() in DownloadRateMonitor::Start()

media/base/download_rate_monitor.cc

 // Copyright (c) 2011 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 "media/base/download_rate_monitor.h"
 
 #include "base/bind.h"
 #include "base/time.h"
 
 namespace media {
@@ skipping 56 matching lines @@
   start_ = end_;
   end_ = BufferingPoint();
 }
 
 DownloadRateMonitor::DownloadRateMonitor() {
   Reset();
 }
 
 void DownloadRateMonitor::Start(
     const base::Closure& canplaythrough_cb, int media_bitrate) {
-  DCHECK(stopped_);
   canplaythrough_cb_ = canplaythrough_cb;
   stopped_ = false;
   bitrate_ = media_bitrate;
   current_sample_.Reset();
   buffered_bytes_ = 0;
 
   NotifyCanPlayThroughIfNeeded();
 }
 
 void DownloadRateMonitor::SetBufferedBytes(
@@ skipping 153 matching lines @@
 }
 
 void DownloadRateMonitor::NotifyCanPlayThroughIfNeeded() {
   if (ShouldNotifyCanPlayThrough() && !canplaythrough_cb_.is_null()) {
     canplaythrough_cb_.Run();
     has_notified_can_play_through_ = true;
   }
 }
 
 }  // namespace media