Adding DRP specfic UMA for FirstContentfulPaint

components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.cc

Index: components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.cc
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.cc
index 16467f14922df1455ebfe814c82a3054976a0dad..eea7828f191f12a570e8dbdc8a525c29bdf8af6c 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_network_delegate.cc
@@ -6,20 +6,21 @@
 
 #include <utility>
 
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/time/time.h"
 #include "base/values.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"
+#include "components/data_reduction_proxy/core/browser/data_reduction_proxy_data.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_request_options.h"
 #include "components/data_reduction_proxy/core/common/lofi_decider.h"
 #include "net/base/load_flags.h"
 #include "net/http/http_request_headers.h"
 #include "net/http/http_response_headers.h"
 #include "net/proxy/proxy_info.h"
 #include "net/proxy/proxy_server.h"
 #include "net/proxy/proxy_service.h"
 #include "net/url_request/url_request.h"
@@ -152,35 +153,51 @@ DataReductionProxyNetworkDelegate::SessionNetworkStatsInfoToValue() const {
                   base::Int64ToString(total_original_received_bytes_));
   return dict;
 }
 
 void DataReductionProxyNetworkDelegate::OnBeforeSendProxyHeadersInternal(
     net::URLRequest* request,
     const net::ProxyInfo& proxy_info,
     net::HttpRequestHeaders* headers) {
   DCHECK(data_reduction_proxy_config_);
 
+  if (data_reduction_proxy_config_->IsDataReductionProxy(
+          proxy_info.proxy_server().host_port_pair(), nullptr)) {
+    // Get an existing Data instance off of URLRequest or create a new Data
+    // instance for this URLRequest.
+    DataReductionProxyData* data =
+        DataReductionProxyData::DataForRequest(request, true);
+    if (data)
+      data->set_used_data_reduction_proxy(true);
+  }
+
   if (proxy_info.is_empty())
     return;
 
   if (data_reduction_proxy_io_data_ &&
       data_reduction_proxy_io_data_->lofi_decider() && request) {
     LoFiDecider* lofi_decider = data_reduction_proxy_io_data_->lofi_decider();
     bool is_using_lofi_mode = lofi_decider->MaybeAddLoFiDirectiveToHeaders(
         *request, headers, proxy_info.proxy_server(),
         data_reduction_proxy_config_);
 
     if ((request->load_flags() & net::LOAD_MAIN_FRAME)) {
       // TODO(megjablon): Need to switch to per page.
       data_reduction_proxy_io_data_->SetLoFiModeActiveOnMainFrame(
           is_using_lofi_mode);
     }
+    // Get an existing Data instance off of URLRequest or create a new Data
+    // instance for this URLRequest.
+    DataReductionProxyData* data =
+        DataReductionProxyData::DataForRequest(request, true);
+    if (data)
+      data->set_is_using_lofi(is_using_lofi_mode);
   }
 
   if (data_reduction_proxy_request_options_) {
     data_reduction_proxy_request_options_->MaybeAddRequestHeader(
         proxy_info.proxy_server(), headers);
   }
 }
 
 void DataReductionProxyNetworkDelegate::OnCompletedInternal(
     net::URLRequest* request,