Add data reduction functionality to all platforms.

components/data_reduction_proxy/browser/data_reduction_proxy_statistics_prefs.cc

 // Copyright 2014 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 "components/data_reduction_proxy/browser/data_reduction_proxy_statistics_prefs.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
@@ skipping 87 matching lines @@
   if (delay_ == base::TimeDelta())
     return ListPrefUpdate(pref_service_, pref_path).Get();
 
   DelayedWritePrefs();
   return list_pref_map_.get(pref_path);
 }
 
 void DataReductionProxyStatisticsPrefs::WritePrefs() {
   if (delay_ == base::TimeDelta())
       return;
-  DCHECK(delayed_task_posted_);
 
   for (DataReductionProxyPrefMap::iterator iter = pref_map_.begin();
        iter != pref_map_.end(); ++iter) {
     pref_service_->SetInt64(iter->first, iter->second);
   }
 
   for (DataReductionProxyListPrefMap::iterator iter = list_pref_map_.begin();
        iter != list_pref_map_.end(); ++iter) {
     TransferList(*(iter->second),
                  ListPrefUpdate(pref_service_, iter->first).Get());
@@ skipping 35 matching lines @@
     return 0;
   }
 
   int64 value = 0;
   bool rv = base::StringToInt64(string_value, &value);
   DCHECK(rv);
   return value;
 }
 
 }  // namespace data_reduction_proxy