Revert "Currently, base/timer.cc calls PostTask with FROM_HERE as the Location,

media/filters/adaptive_demuxer.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 "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/string_number_conversions.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
@@ skipping 80 matching lines @@
 }
 
 StreamSwitchManager::~StreamSwitchManager() {}
 
 void StreamSwitchManager::Play() {
   DCHECK_EQ(MessageLoop::current(), message_loop_);
   DCHECK(!playing_);
   playing_ = true;
 
   if (video_ids_.size() > 1) {
-    timer_.Start(FROM_HERE,
-                 base::TimeDelta::FromMilliseconds(kSwitchTimerPeriod),
+    timer_.Start(base::TimeDelta::FromMilliseconds(kSwitchTimerPeriod),
                  this, &StreamSwitchManager::OnSwitchTimer);
   }
 }
 
 void StreamSwitchManager::Pause() {
   DCHECK_EQ(MessageLoop::current(), message_loop_);
   DCHECK(playing_);
   playing_ = false;
   timer_.Stop();
 }
@@ skipping 918 matching lines @@
     delete cb;
     return;
   }
   DemuxerAccumulator* accumulator = new DemuxerAccumulator(
       audio_index, video_index, urls.size(), cb);
   for (size_t i = 0; i < urls.size(); ++i)
     delegate_factory_->Build(urls[i], accumulator->GetNthCallback(i));
 }
 
 }  // namespace media