Change scoped_ptr to std::unique_ptr in //net.

net/cookies/cookie_store_test_helpers.h

Index: net/cookies/cookie_store_test_helpers.h
diff --git a/net/cookies/cookie_store_test_helpers.h b/net/cookies/cookie_store_test_helpers.h
index f0fe1f963d3a5333159dc07f73a33ab992869199..687261ec7bca110e53c67b2f38e8fa4c2ab7ed9a 100644
--- a/net/cookies/cookie_store_test_helpers.h
+++ b/net/cookies/cookie_store_test_helpers.h
@@ -89,9 +89,10 @@ class DelayedCookieMonster : public CookieStore {
 
   void FlushStore(const base::Closure& callback) override;
 
-  scoped_ptr<CookieStore::CookieChangedSubscription>
-  AddCallbackForCookie(const GURL& url, const std::string& name,
-                       const CookieChangedCallback& callback) override;
+  std::unique_ptr<CookieStore::CookieChangedSubscription> AddCallbackForCookie(
+      const GURL& url,
+      const std::string& name,
+      const CookieChangedCallback& callback) override;
 
   bool IsEphemeral() override;
 
@@ -116,7 +117,7 @@ class DelayedCookieMonster : public CookieStore {
 
   friend class base::RefCountedThreadSafe<DelayedCookieMonster>;
 
-  scoped_ptr<CookieMonster> cookie_monster_;
+  std::unique_ptr<CookieMonster> cookie_monster_;
 
   bool did_run_;
   bool result_;