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

components/search_engines/template_url.cc

Index: components/search_engines/template_url.cc
diff --git a/components/search_engines/template_url.cc b/components/search_engines/template_url.cc
index 52fcebc5801ce13874e980de477d4202124b0026..c9b2922c7399dd81031d449206104d2e9c3c687c 100644
--- a/components/search_engines/template_url.cc
+++ b/components/search_engines/template_url.cc
@@ -153,6 +153,9 @@ TemplateURLRef::SearchTermsArgs::SearchTermsArgs(
       from_app_list(false),
       contextual_search_params(ContextualSearchParams()) {}
 
+TemplateURLRef::SearchTermsArgs::SearchTermsArgs(const SearchTermsArgs& other) =
+    default;
+
 TemplateURLRef::SearchTermsArgs::~SearchTermsArgs() {
 }
 
@@ -198,6 +201,9 @@ TemplateURLRef::SearchTermsArgs::ContextualSearchParams::
       resolve(resolve) {
 }
 
+TemplateURLRef::SearchTermsArgs::ContextualSearchParams::ContextualSearchParams(
+    const ContextualSearchParams& other) = default;
+
 TemplateURLRef::SearchTermsArgs::ContextualSearchParams::
     ~ContextualSearchParams() {
 }