Implementation of translation event logging.

components/translate/core/common/BUILD.gn

Index: components/translate/core/common/BUILD.gn
diff --git a/components/translate/core/common/BUILD.gn b/components/translate/core/common/BUILD.gn
index f8038c92d811a49a87829c19decbd7f7716bfd9b..5479766fb80b07ac6e9b5287bb605bba38b74023 100644
--- a/components/translate/core/common/BUILD.gn
+++ b/components/translate/core/common/BUILD.gn
@@ -15,10 +15,14 @@ static_library("common") {
     "translate_switches.h",
     "translate_util.cc",
     "translate_util.h",
+    "translation_logging_helper.cc",
+    "translation_logging_helper.h",
   ]
 
   deps = [
     "//base",
+    "//components/metrics/proto",
+    "//components/sync/protocol",
     "//url",
   ]
 }
@@ -28,10 +32,13 @@ source_set("unit_tests") {
   sources = [
     "translate_metrics_unittest.cc",
     "translate_util_unittest.cc",
+    "translation_logging_helper_unittest.cc",
   ]
   deps = [
     ":common",
     "//base",
+    "//components/metrics/proto",
+    "//components/sync/protocol",
     "//testing/gtest",
     "//url",
   ]