components: Add out-of-line copy ctors for complex classes.

components/update_client/update_response.cc

Index: components/update_client/update_response.cc
diff --git a/components/update_client/update_response.cc b/components/update_client/update_response.cc
index cbdaee8f215027d4939d97e58bd25a2645a24762..bdf77f822a5c493264737cacaa79497c25804e14 100644
--- a/components/update_client/update_response.cc
+++ b/components/update_client/update_response.cc
@@ -28,22 +28,26 @@ UpdateResponse::~UpdateResponse() {
 
 UpdateResponse::Results::Results() : daystart_elapsed_seconds(kNoDaystart) {
 }
+UpdateResponse::Results::Results(const Results& other) = default;
 UpdateResponse::Results::~Results() {
 }
 
 UpdateResponse::Result::Result() {
 }
-
+UpdateResponse::Result::Result(const Result& other) = default;
 UpdateResponse::Result::~Result() {
 }
 
 UpdateResponse::Result::Manifest::Manifest() {
 }
+UpdateResponse::Result::Manifest::Manifest(const Manifest& other) = default;
 UpdateResponse::Result::Manifest::~Manifest() {
 }
 
 UpdateResponse::Result::Manifest::Package::Package() : size(0), sizediff(0) {
 }
+UpdateResponse::Result::Manifest::Package::Package(const Package& other) =
+    default;
 UpdateResponse::Result::Manifest::Package::~Package() {
 }