LevelDB storage for data reduction proxy to store data usage stats.

components/data_reduction_proxy/core/browser/BUILD.gn

Index: components/data_reduction_proxy/core/browser/BUILD.gn
diff --git a/components/data_reduction_proxy/core/browser/BUILD.gn b/components/data_reduction_proxy/core/browser/BUILD.gn
index 22e939a52a57d768b92179a6f5e90df22faa8885..96836798b9844c96cc8c5213730545ada24b933e 100644
--- a/components/data_reduction_proxy/core/browser/BUILD.gn
+++ b/components/data_reduction_proxy/core/browser/BUILD.gn
@@ -42,8 +42,14 @@ static_library("browser") {
     "data_reduction_proxy_service_observer.h",
     "data_reduction_proxy_settings.cc",
     "data_reduction_proxy_settings.h",
+    "data_reduction_proxy_store.cc",
+    "data_reduction_proxy_store.h",
+    "data_reduction_proxy_store_impl.cc",
+    "data_reduction_proxy_store_impl.h",
     "data_reduction_proxy_tamper_detection.cc",
     "data_reduction_proxy_tamper_detection.h",
+    "data_usage_storage_helper.cc",
+    "data_usage_storage_helper.h",
   ]
 
   deps = [
@@ -54,6 +60,7 @@ static_library("browser") {
     "//components/pref_registry",
     "//crypto",
     "//net",
+    "//third_party/leveldatabase",
     "//url",
   ]
   if (!is_android && !is_ios) {
@@ -109,6 +116,7 @@ source_set("unit_tests") {
     "data_reduction_proxy_prefs_unittest.cc",
     "data_reduction_proxy_request_options_unittest.cc",
     "data_reduction_proxy_settings_unittest.cc",
+    "data_usage_storage_helper_unittest.cc",
   ]
 
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]