Report save-data savings to LiteMode site-breakdown

This CL gets the estimated data savings due to SaveData and updates as
LiteMode savings. The savings are retrieved from field trial as json.

Bug: 923551
Change-Id: Ia7c5518edfeaedce33e957c19224f6a2350df6c2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1990989
Commit-Queue: rajendrant <rajendrant@chromium.org>
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Reviewed-by: Ryan Sturm <ryansturm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#729972}

chrome/browser/page_load_metrics/observers/data_saver_site_breakdown_metrics_observer.cc

@@ -50,6 +50,10 @@ DataSaverSiteBreakdownMetricsObserver::OnCommit(
   committed_host_ = navigation_handle->GetWebContents()
                         ->GetLastCommittedURL()
                         .HostNoBrackets();
+  committed_origin_ = navigation_handle->GetWebContents()
+                          ->GetLastCommittedURL()
+                          .GetOrigin()
+                          .spec();
   return CONTINUE_OBSERVING;
 }
 
@@ -65,6 +69,7 @@ void DataSaverSiteBreakdownMetricsObserver::OnResourceDataUseObserved(
   if (data_reduction_proxy_settings &&
       data_reduction_proxy_settings->data_reduction_proxy_service()) {
     DCHECK(!committed_host_.empty());
+    DCHECK(!committed_origin_.empty());
     int64_t received_data_length = 0;
     int64_t data_reduction_proxy_bytes_saved = 0;
     for (auto const& resource : resources) {
@@ -83,6 +88,14 @@ void DataSaverSiteBreakdownMetricsObserver::OnResourceDataUseObserved(
             (resource->data_reduction_proxy_compression_ratio_estimate - 1.0);
       }
     }
+    double origin_save_data_savings =
+        data_reduction_proxy_settings->data_reduction_proxy_service()
+            ->GetSaveDataSavingsPercentEstimate(committed_origin_);
+    if (origin_save_data_savings) {
+      data_reduction_proxy_bytes_saved +=
+          received_data_length * origin_save_data_savings / 100;
+    }
+
     data_reduction_proxy_settings->data_reduction_proxy_service()
         ->UpdateDataUseForHost(
             received_data_length,

chrome/browser/page_load_metrics/observers/data_saver_site_breakdown_metrics_observer.h

@@ -42,6 +42,7 @@ class DataSaverSiteBreakdownMetricsObserver
       const std::string& mime_type) const override;
 
   std::string committed_host_;
+  std::string committed_origin_;
 
   // The browser context this navigation is operating in.
   content::BrowserContext* browser_context_ = nullptr;

components/data_reduction_proxy/core/browser/data_reduction_proxy_service.cc

@@ -8,6 +8,7 @@
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
+#include "base/json/json_reader.h"
 #include "base/location.h"
 #include "base/metrics/field_trial_params.h"
 #include "base/metrics/histogram_macros.h"
@@ -39,6 +40,22 @@
 
 namespace data_reduction_proxy {
 
+namespace {
+
+base::Optional<base::Value> GetSaveDataSavingsPercentEstimateFromFieldTrial() {
+  if (!base::FeatureList::IsEnabled(features::kReportSaveDataSavings))
+    return base::nullopt;
+  const auto origin_savings_estimate_json =
+      base::GetFieldTrialParamValueByFeature(features::kReportSaveDataSavings,
+                                             "origin_savings_estimate");
+  if (origin_savings_estimate_json.empty())
+    return base::nullopt;
+
+  return base::JSONReader::Read(origin_savings_estimate_json);
+}
+
+}  // namespace
+
 DataReductionProxyService::DataReductionProxyService(
     DataReductionProxySettings* settings,
     PrefService* prefs,
@@ -62,7 +79,9 @@ DataReductionProxyService::DataReductionProxyService(
       data_use_measurement_(data_use_measurement),
       effective_connection_type_(net::EFFECTIVE_CONNECTION_TYPE_UNKNOWN),
       client_(client),
-      channel_(channel) {
+      channel_(channel),
+      save_data_savings_estimate_dict_(
+          GetSaveDataSavingsPercentEstimateFromFieldTrial()) {
   DCHECK(settings);
   DCHECK(network_quality_tracker_);
   DCHECK(network_connection_tracker_);
@@ -405,8 +424,6 @@ void DataReductionProxyService::MarkProxiesAsBad(
   // process (renderer).
 
   if (bypass_duration < base::TimeDelta()) {
-    LOG(ERROR) << "Received bad MarkProxiesAsBad() -- invalid bypass_duration: "
-               << bypass_duration;
     std::move(callback).Run();
     return;
   }
@@ -420,8 +437,6 @@ void DataReductionProxyService::MarkProxiesAsBad(
   // received (FindConfiguredDataReductionProxy() searches recent proxies too).
   for (const auto& proxy : bad_proxies.GetAll()) {
     if (!config_->FindConfiguredDataReductionProxy(proxy)) {
-      LOG(ERROR) << "Received bad MarkProxiesAsBad() -- not a DRP server: "
-                 << proxy.ToURI();
       std::move(callback).Run();
       return;
     }
@@ -550,4 +565,17 @@ void DataReductionProxyService::SetDependenciesForTesting(
     config_client_->Initialize(url_loader_factory_);
 }
 
+double DataReductionProxyService::GetSaveDataSavingsPercentEstimate(
+    const std::string& origin) const {
+  if (origin.empty() || !save_data_savings_estimate_dict_ ||
+      !save_data_savings_estimate_dict_->is_dict()) {
+    return 0;
+  }
+  const auto savings_percent =
+      save_data_savings_estimate_dict_->FindDoubleKey(origin);
+  if (!savings_percent)
+    return 0;
+  return *savings_percent;
+}
+
 }  // namespace data_reduction_proxy

components/data_reduction_proxy/core/browser/data_reduction_proxy_service.h

@@ -16,6 +16,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/sequence_checker.h"
+#include "base/values.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_metrics.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_util.h"
 #include "components/data_reduction_proxy/core/browser/db_data_owner.h"
@@ -164,6 +165,10 @@ class DataReductionProxyService
   void Clone(
       mojo::PendingReceiver<mojom::DataReductionProxy> receiver) override;
 
+  // Returns the percentage of data savings estimate provided by save-data for
+  // an origin.
+  double GetSaveDataSavingsPercentEstimate(const std::string& origin) const;
+
   // Accessor methods.
   DataReductionProxyCompressionStats* compression_stats() const {
     return compression_stats_.get();
@@ -309,6 +314,9 @@ class DataReductionProxyService
   // is unavailable, then the destruction will happen on the UI thread.
   std::unique_ptr<NetworkPropertiesManager> network_properties_manager_;
 
+  // Dictionary of save-data savings estimates by origin.
+  const base::Optional<base::Value> save_data_savings_estimate_dict_;
+
   // The set of clients that will get updates about changes to the proxy config.
   mojo::RemoteSet<network::mojom::CustomProxyConfigClient>
       proxy_config_clients_;

components/data_reduction_proxy/core/common/data_reduction_proxy_features.cc

@@ -74,5 +74,10 @@ const base::Feature kDataReductionProxyAggressiveConfigFetch{
     "DataReductionProxyAggressiveConfigFetch",
     base::FEATURE_ENABLED_BY_DEFAULT};
 
+// Reports estimated data savings due to save-data request header and JS API, as
+// savings provided by DataSaver.
+const base::Feature kReportSaveDataSavings{"ReportSaveDataSavings",
+                                           base::FEATURE_DISABLED_BY_DEFAULT};
+
 }  // namespace features
 }  // namespace data_reduction_proxy

components/data_reduction_proxy/core/common/data_reduction_proxy_features.h

@@ -21,6 +21,7 @@ extern const base::Feature kDataReductionProxyPopulatePreviewsPageIDToPingback;
 extern const base::Feature kDataReductionProxyDisableProxyFailedWarmup;
 extern const base::Feature kDataReductionProxyServerExperiments;
 extern const base::Feature kDataReductionProxyAggressiveConfigFetch;
+extern const base::Feature kReportSaveDataSavings;
 
 }  // namespace features
 }  // namespace data_reduction_proxy