Remove unused fields from DataReductionProxyDelegate

Looks like the timing info is no longer being used.

Bug: 721403
Change-Id: Id99af7695e93026211b97567296daccfd84ed176
Reviewed-on: https://chromium-review.googlesource.com/1238620Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Commit-Queue: Clark DuVall <cduvall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593310}

components/data_reduction_proxy/core/browser/data_reduction_proxy_delegate.cc

@@ -9,8 +9,6 @@
 #include "base/command_line.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/stl_util.h"
-#include "base/time/default_tick_clock.h"
-#include "base/time/tick_clock.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_bypass_stats.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_config.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_configurator.h"
@@ -40,16 +38,13 @@ DataReductionProxyDelegate::DataReductionProxyDelegate(
     const DataReductionProxyConfigurator* configurator,
     DataReductionProxyEventCreator* event_creator,
     DataReductionProxyBypassStats* bypass_stats,
-    net::NetLog* net_log,
-    network::NetworkConnectionTracker* network_connection_tracker)
+    net::NetLog* net_log)
     : config_(config),
       configurator_(configurator),
       event_creator_(event_creator),
       bypass_stats_(bypass_stats),
-      tick_clock_(base::DefaultTickClock::GetInstance()),
       io_data_(nullptr),
-      net_log_(net_log),
-      network_connection_tracker_(network_connection_tracker) {
+      net_log_(net_log) {
   DCHECK(config_);
   DCHECK(configurator_);
   DCHECK(event_creator_);
@@ -61,14 +56,12 @@ DataReductionProxyDelegate::DataReductionProxyDelegate(
 
 DataReductionProxyDelegate::~DataReductionProxyDelegate() {
   DCHECK(thread_checker_.CalledOnValidThread());
-  network_connection_tracker_->RemoveNetworkConnectionObserver(this);
 }
 
 void DataReductionProxyDelegate::InitializeOnIOThread(
     DataReductionProxyIOData* io_data) {
   DCHECK(io_data);
   DCHECK(thread_checker_.CalledOnValidThread());
-  network_connection_tracker_->AddNetworkConnectionObserver(this);
   io_data_ = io_data;
 }
 
@@ -169,14 +162,6 @@ void DataReductionProxyDelegate::OnFallback(const net::ProxyServer& bad_proxy,
     bypass_stats_->OnProxyFallback(bad_proxy, net_error);
 }
 
-void DataReductionProxyDelegate::SetTickClockForTesting(
-    const base::TickClock* tick_clock) {
-  tick_clock_ = tick_clock;
-  // Update |last_network_change_time_| to the provided tick clock's current
-  // time for testing.
-  last_network_change_time_ = tick_clock_->NowTicks();
-}
-
 void DataReductionProxyDelegate::GetAlternativeProxy(
     const GURL& url,
     const net::ProxyRetryInfoMap& proxy_retry_info,
@@ -236,14 +221,4 @@ void DataReductionProxyDelegate::RecordQuicProxyStatus(
                             QUIC_PROXY_STATUS_BOUNDARY);
 }
 
-void DataReductionProxyDelegate::OnConnectionChanged(
-    network::mojom::ConnectionType type) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-
-  if (type == network::mojom::ConnectionType::CONNECTION_NONE)
-    return;
-
-  last_network_change_time_ = tick_clock_->NowTicks();
-}
-
 }  // namespace data_reduction_proxy

components/data_reduction_proxy/core/browser/data_reduction_proxy_delegate.h

@@ -11,13 +11,8 @@
 #include "base/threading/thread_checker.h"
 #include "net/base/proxy_delegate.h"
 #include "net/proxy_resolution/proxy_retry_info.h"
-#include "services/network/public/cpp/network_connection_tracker.h"
 #include "url/gurl.h"
 
-namespace base {
-class TickClock;
-}
-
 namespace net {
 class NetLog;
 class ProxyInfo;
@@ -32,19 +27,15 @@ class DataReductionProxyConfigurator;
 class DataReductionProxyEventCreator;
 class DataReductionProxyIOData;
 
-class DataReductionProxyDelegate
-    : public net::ProxyDelegate,
-      public network::NetworkConnectionTracker::NetworkConnectionObserver {
+class DataReductionProxyDelegate : public net::ProxyDelegate {
  public:
   // ProxyDelegate instance is owned by io_thread. |auth_handler| and |config|
   // outlives this class instance.
-  DataReductionProxyDelegate(
-      DataReductionProxyConfig* config,
+  DataReductionProxyDelegate(DataReductionProxyConfig* config,
                              const DataReductionProxyConfigurator* configurator,
                              DataReductionProxyEventCreator* event_creator,
                              DataReductionProxyBypassStats* bypass_stats,
-      net::NetLog* net_log,
-      network::NetworkConnectionTracker* network_connection_tracker);
+                             net::NetLog* net_log);
 
   ~DataReductionProxyDelegate() override;
 
@@ -58,8 +49,6 @@ class DataReductionProxyDelegate
                       net::ProxyInfo* result) override;
   void OnFallback(const net::ProxyServer& bad_proxy, int net_error) override;
 
-  void SetTickClockForTesting(const base::TickClock* tick_clock);
-
  protected:
   // Protected so that it can be overridden during testing.
   // Returns true if |proxy_server| supports QUIC.
@@ -79,9 +68,6 @@ class DataReductionProxyDelegate
   // Records the availability status of data reduction proxy.
   void RecordQuicProxyStatus(QuicProxyStatus status) const;
 
-  // network::NetworkConnectionTracker::NetworkConnectionObserver:
-  void OnConnectionChanged(network::mojom::ConnectionType type) override;
-
   // Checks if the first proxy server in |result| supports QUIC and if so
   // adds an alternative proxy configuration to |result|.
   void GetAlternativeProxy(const GURL& url,
@@ -93,19 +79,10 @@ class DataReductionProxyDelegate
   DataReductionProxyEventCreator* event_creator_;
   DataReductionProxyBypassStats* bypass_stats_;
 
-  // Tick clock used for obtaining the current time.
-  const base::TickClock* tick_clock_;
-
-  // Set to the time when last IP address change event was received, or the time
-  // of initialization of |this|, whichever is later.
-  base::TimeTicks last_network_change_time_;
-
   DataReductionProxyIOData* io_data_;
 
   net::NetLog* net_log_;
 
-  network::NetworkConnectionTracker* network_connection_tracker_;
-
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(DataReductionProxyDelegate);

components/data_reduction_proxy/core/browser/data_reduction_proxy_delegate_unittest.cc

@@ -51,7 +51,6 @@
 #include "net/traffic_annotation/network_traffic_annotation_test_helper.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_test_util.h"
-#include "services/network/test/test_network_connection_tracker.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using testing::_;
@@ -89,13 +88,11 @@ class TestDataReductionProxyDelegate : public DataReductionProxyDelegate {
       DataReductionProxyBypassStats* bypass_stats,
       bool proxy_supports_quic,
       net::NetLog* net_log)
-      : DataReductionProxyDelegate(
-            config,
+      : DataReductionProxyDelegate(config,
                                    configurator,
                                    event_creator,
                                    bypass_stats,
-            net_log,
-            network::TestNetworkConnectionTracker::GetInstance()),
+                                   net_log),
         proxy_supports_quic_(proxy_supports_quic) {}
 
   ~TestDataReductionProxyDelegate() override {}

components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data.cc

@@ -173,7 +173,7 @@ DataReductionProxyIOData::DataReductionProxyIOData(
 
   proxy_delegate_.reset(new DataReductionProxyDelegate(
       config_.get(), configurator_.get(), event_creator_.get(),
-      bypass_stats_.get(), net_log_, network_connection_tracker_));
+      bypass_stats_.get(), net_log_));
   network_properties_manager_.reset(new NetworkPropertiesManager(
       base::DefaultClock::GetInstance(), prefs, ui_task_runner_));
 }
@@ -297,7 +297,7 @@ DataReductionProxyIOData::CreateProxyDelegate() const {
   DCHECK(io_task_runner_->BelongsToCurrentThread());
   return std::make_unique<DataReductionProxyDelegate>(
       config_.get(), configurator_.get(), event_creator_.get(),
-      bypass_stats_.get(), net_log_, network_connection_tracker_);
+      bypass_stats_.get(), net_log_);
 }
 
 // TODO(kundaji): Rename this method to something more descriptive.

components/data_reduction_proxy/core/browser/data_reduction_proxy_test_utils.cc

@@ -539,8 +539,7 @@ DataReductionProxyTestContext::Builder::Build() {
 
   io_data->set_proxy_delegate(base::WrapUnique(new DataReductionProxyDelegate(
       io_data->config(), io_data->configurator(), io_data->event_creator(),
-      io_data->bypass_stats(), net_log.get(),
-      test_network_connection_tracker)));
+      io_data->bypass_stats(), net_log.get())));
 
   std::unique_ptr<DataReductionProxyTestContext> test_context(
       new DataReductionProxyTestContext(