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

components/search_engines/template_url.h

Index: components/search_engines/template_url.h
diff --git a/components/search_engines/template_url.h b/components/search_engines/template_url.h
index 42958ab214edc1e2ff59937d967d834636cc46db..89d313afcb57db114ad4c201948617f740cbb77e 100644
--- a/components/search_engines/template_url.h
+++ b/components/search_engines/template_url.h
@@ -73,6 +73,7 @@ class TemplateURLRef {
   // is required and is passed in the constructor.
   struct SearchTermsArgs {
     explicit SearchTermsArgs(const base::string16& search_terms);
+    SearchTermsArgs(const SearchTermsArgs& other);
     ~SearchTermsArgs();
 
     struct ContextualSearchParams {
@@ -95,6 +96,7 @@ class TemplateURLRef {
                              const std::string& base_page_url,
                              const std::string& encoding,
                              const bool resolve);
+      ContextualSearchParams(const ContextualSearchParams& other);
       ~ContextualSearchParams();
 
       // The version of contextual search.