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 19e13b26b0622947bf7c613ef4d38003eac5c3cc..84e3052d1ed72af1eb8d0c55b216f0a17c5a2e7d 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"
@@ -162,44 +163,52 @@ void DataReductionProxyNetworkDelegate::OnBeforeURLRequestInternal(
       (request->load_flags() & net::LOAD_MAIN_FRAME)) {
     data_reduction_proxy_io_data_->SetLoFiModeActiveOnMainFrame(false);
   }
 }
 
 void DataReductionProxyNetworkDelegate::OnBeforeSendProxyHeadersInternal(
     net::URLRequest* request,
     const net::ProxyInfo& proxy_info,
     net::HttpRequestHeaders* headers) {
   DCHECK(data_reduction_proxy_config_);
-
-  if (proxy_info.is_empty())
-    return;
   if (!proxy_info.proxy_server().is_valid())
     return;
   if (proxy_info.proxy_server().is_direct())
     return;
   if (proxy_info.proxy_server().host_port_pair().IsEmpty())
     return;
   if (!data_reduction_proxy_config_->IsDataReductionProxy(
           proxy_info.proxy_server().host_port_pair(), nullptr)) {
     return;
   }
 
+  // Retrieves DataReductionProxyData from a request, creating a new instance
+  // if needed.
+  DataReductionProxyData* data =
+      DataReductionProxyData::GetDataAndCreateIfNecessary(request);
+  if (data)
+    data->set_used_data_reduction_proxy(true);
+
   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);
 
     if ((request->load_flags() & net::LOAD_MAIN_FRAME)) {
       data_reduction_proxy_io_data_->SetLoFiModeActiveOnMainFrame(
           is_using_lofi_mode);
     }
+    // Retrieves DataReductionProxyData from a request.
+    DataReductionProxyData* data = DataReductionProxyData::GetData(*request);
+    if (data)
+      data->set_lofi_requested(is_using_lofi_mode);
   }
 
   if (data_reduction_proxy_request_options_) {
     data_reduction_proxy_request_options_->AddRequestHeader(headers);
   }
 }
 
 void DataReductionProxyNetworkDelegate::OnCompletedInternal(
     net::URLRequest* request,
     bool started) {