Add more out of line copy ctors for complex classes.

net/cookies/cookie_monster_store_test.h

Index: net/cookies/cookie_monster_store_test.h
diff --git a/net/cookies/cookie_monster_store_test.h b/net/cookies/cookie_monster_store_test.h
index e20584d5ad0f8202aecbeae4a6ac94bc4ad8567f..4458c6c99d43aa2980d66897bea75563f606e777 100644
--- a/net/cookies/cookie_monster_store_test.h
+++ b/net/cookies/cookie_monster_store_test.h
@@ -73,6 +73,8 @@ struct CookieStoreCommand {
   // Constructor for ADD, UPDATE_ACCESS_TIME, and REMOVE calls.
   CookieStoreCommand(Type type, const CanonicalCookie& cookie);
 
+  CookieStoreCommand(const CookieStoreCommand& other);
+
   ~CookieStoreCommand();
 
   Type type;