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

net/disk_cache/backend_impl.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 "net/disk_cache/backend_impl.h"
 
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/message_loop.h"
 #include "base/metrics/field_trial.h"
@@ skipping 454 matching lines @@
   }
 
   num_refs_ = num_pending_io_ = max_refs_ = 0;
   entry_count_ = byte_count_ = 0;
 
   if (!restarted_) {
     buffer_bytes_ = 0;
     trace_object_ = TraceObject::GetTraceObject();
     // Create a recurrent timer of 30 secs.
     int timer_delay = unit_test_ ? 1000 : 30000;
-    timer_.Start(FROM_HERE, TimeDelta::FromMilliseconds(timer_delay), this,
+    timer_.Start(TimeDelta::FromMilliseconds(timer_delay), this,
                  &BackendImpl::OnStatsTimer);
   }
 
   init_ = true;
 
   if (data_->header.experiment != NO_EXPERIMENT &&
       cache_type_ != net::DISK_CACHE) {
     // No experiment for other caches.
     return net::ERR_FAILED;
   }
@@ skipping 1634 matching lines @@
     if (total_memory > kMaxBuffersSize || total_memory <= 0)
       total_memory = kMaxBuffersSize;
 
     done = true;
   }
 
   return static_cast<int>(total_memory);
 }
 
 }  // namespace disk_cache