Use base::flat_map for base::Value dictionary storage.

base/values.cc

Index: base/values.cc
diff --git a/base/values.cc b/base/values.cc
index d492a474631c841442d72851ebff94ff3d163241..0d807125d5db089a8d54376ee584d26f042b67de 100644
--- a/base/values.cc
+++ b/base/values.cc
@@ -159,6 +159,10 @@ Value::Value(const string16& in_string) : type_(Type::STRING) {
 
 Value::Value(StringPiece in_string) : Value(in_string.as_string()) {}
 
+Value::Value(DictStorage&& in_dict) noexcept : type_(Type::DICTIONARY) {

[jdoerrie, 2017/04/10 11:44:57]

Same here.

+  dict_ptr_.Init(MakeUnique<DictStorage>(std::move(in_dict)));
+}
+
 Value::Value(const std::vector<char>& in_blob) : type_(Type::BINARY) {
   binary_value_.Init(in_blob);
 }