Add data usage tracking for data reduction proxy, precache services

components/data_use_measurement/core/data_use_user_data.cc

Index: components/data_use_measurement/core/data_use_user_data.cc
diff --git a/components/data_use_measurement/core/data_use_user_data.cc b/components/data_use_measurement/core/data_use_user_data.cc
index 09ee1d6ec69c353ca088297967f74602dd1557cd..ae1ca742e52170d4a53bda970f51770c92dd285c 100644
--- a/components/data_use_measurement/core/data_use_user_data.cc
+++ b/components/data_use_measurement/core/data_use_user_data.cc
@@ -60,6 +60,10 @@ std::string DataUseUserData::GetServiceNameAsString(ServiceName service_name) {
       return "NTPSnippets";
     case SAFE_BROWSING:
       return "SafeBrowsing";
+    case DATA_REDUCTION_PROXY:
+      return "DataReductionProxy";
+    case PRECACHE:
+      return "Precache";
   }
   return "INVALID";
 }