CookieStore: Remove reference counting.

ios/chrome/browser/browser_state/chrome_browser_state_io_data.h

Index: ios/chrome/browser/browser_state/chrome_browser_state_io_data.h
diff --git a/ios/chrome/browser/browser_state/chrome_browser_state_io_data.h b/ios/chrome/browser/browser_state/chrome_browser_state_io_data.h
index 837cf9b843c3cf6121c30ff1f054a0c62618f501..4fc14d2d12053395427f3fc8b2ebeeaced09a0c7 100644
--- a/ios/chrome/browser/browser_state/chrome_browser_state_io_data.h
+++ b/ios/chrome/browser/browser_state/chrome_browser_state_io_data.h
@@ -142,7 +142,7 @@ class ChromeBrowserStateIOData {
    public:
     AppRequestContext();
 
-    void SetCookieStore(net::CookieStore* cookie_store);
+    void SetCookieStore(scoped_ptr<net::CookieStore> cookie_store);
     void SetHttpTransactionFactory(
         scoped_ptr<net::HttpTransactionFactory> http_factory);
     void SetJobFactory(scoped_ptr<net::URLRequestJobFactory> job_factory);
@@ -150,7 +150,7 @@ class ChromeBrowserStateIOData {
    private:
     ~AppRequestContext() override;
 
-    scoped_refptr<net::CookieStore> cookie_store_;
+    scoped_ptr<net::CookieStore> cookie_store_;
     scoped_ptr<net::HttpTransactionFactory> http_factory_;
     scoped_ptr<net::URLRequestJobFactory> job_factory_;
   };