Move content/renderer/background_sync to Blink

mojo/common/common_custom_types_struct_traits.h

Index: mojo/common/common_custom_types_struct_traits.h
diff --git a/mojo/common/common_custom_types_struct_traits.h b/mojo/common/common_custom_types_struct_traits.h
index b99e15ffc9d803ff7e0aea30cfc60d671f01b007..45fc6fd17becdbf94fbdb8588958faea0092f38c 100644
--- a/mojo/common/common_custom_types_struct_traits.h
+++ b/mojo/common/common_custom_types_struct_traits.h
@@ -56,6 +56,16 @@ struct StructTraits<common::mojom::UnguessableTokenDataView,
 };
 
 template <>
+struct StructTraits<common::mojom::TimeDataView, base::Time> {
+  static double seconds(const base::Time& time) { return time.ToDoubleT(); }
+
+  static bool Read(common::mojom::TimeDataView data, base::Time* time) {
+    *time = base::Time::FromDoubleT(data.seconds());
+    return true;
+  }
+};
+
+template <>
 struct StructTraits<common::mojom::TimeDeltaDataView, base::TimeDelta> {
   static int64_t microseconds(const base::TimeDelta& delta) {
     return delta.InMicroseconds();