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..e8522c822886f9ad2993f315c93210410c9a5628 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
@@ -6,23 +6,25 @@
 
 #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 "content/browser/frame_host/navigation_user_data.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"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_status.h"
 
@@ -152,20 +154,28 @@ 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_);
 
+  content::NavigationUserData* navigation_user_data =

[RyanSturm, 2016/04/27 23:27:46]

Check if this is a DRP proxy and not some other proxy

+      static_cast<content::NavigationUserData*>(
+          request->GetUserData(content::kNavigationUserDataKey));
+  if (navigation_user_data) {
+    navigation_user_data->get_navigation_supports_user_data()->SetUserData(
+        kDataReductionProxyUserDataKey, new DataReductionProxyData(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_);