Remove unused DataReductionProxy code

components/data_reduction_proxy/core/browser/data_reduction_proxy_experiments_stats.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_experiments_stats.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_experiments_stats.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_experiments_stats.cc
deleted file mode 100644
index 099f088478081db8fccd8e4cde1eec24e31f98b5..0000000000000000000000000000000000000000
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_experiments_stats.cc
+++ /dev/null
@@ -1,69 +0,0 @@
-// Copyright 2015 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/core/browser/data_reduction_proxy_experiments_stats.h"
-
-#include <utility>
-
-#include "base/logging.h"
-#include "components/data_reduction_proxy/core/browser/data_reduction_proxy_config_retrieval_params.h"
-#include "components/data_reduction_proxy/core/common/data_reduction_proxy_pref_names.h"
-
-namespace data_reduction_proxy {
-
-DataReductionProxyExperimentsStats::DataReductionProxyExperimentsStats(
-    const Int64ValueSetter& value_setter)
-    : value_setter_(value_setter), initialized_(false) {
-  // Constructed on the UI thread, but should be checked on the IO thread.
-  thread_checker_.DetachFromThread();
-}
-
-DataReductionProxyExperimentsStats::~DataReductionProxyExperimentsStats() {
-}
-
-void DataReductionProxyExperimentsStats::InitializeOnUIThread(scoped_ptr<
-    DataReductionProxyConfigRetrievalParams> config_retrieval_params) {
-  DCHECK(!initialized_);
-  config_retrieval_params_ = std::move(config_retrieval_params);
-
-  // This method may be called from the UI thread, but should be checked on the
-  // IO thread.
-  thread_checker_.DetachFromThread();
-}
-
-void DataReductionProxyExperimentsStats::InitializeOnIOThread() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK(!initialized_);
-  initialized_ = true;
-  if (config_retrieval_params_) {
-    if (config_retrieval_params_->loaded_expired_config())
-      UpdateSimulatedConfig();
-    config_refresh_time_.Start(
-        FROM_HERE, config_retrieval_params_->refresh_interval(), this,
-        &DataReductionProxyExperimentsStats::UpdateSimulatedConfig);
-  }
-}
-
-void DataReductionProxyExperimentsStats::RecordBytes(
-    const base::Time& request_time,
-    DataReductionProxyRequestType request_type,
-    int64_t received_content_length,
-    int64_t original_content_length) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (config_retrieval_params_) {
-    // Only measure requests which flowed through the Data Reduction Proxy.
-    if (request_type == VIA_DATA_REDUCTION_PROXY) {
-      config_retrieval_params_->RecordStats(
-          request_time, received_content_length, original_content_length);
-    }
-  }
-}
-
-void DataReductionProxyExperimentsStats::UpdateSimulatedConfig() {
-  DCHECK(config_retrieval_params_);
-  value_setter_.Run(prefs::kSimulatedConfigRetrieveTime,
-                    base::Time::Now().ToInternalValue());
-}
-
-}  // namespace data_reduction_proxy