Annotates functions returning retained objects.

components/signin/ios/browser/account_consistency_service.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_SIGNIN_IOS_BROWSER_ACCOUNT_CONSISTENCY_SERVICE_H_
 #define COMPONENTS_SIGNIN_IOS_BROWSER_ACCOUNT_CONSISTENCY_SERVICE_H_
 
 #include <deque>
 #include <map>
 #include <memory>
@@ skipping 97 matching lines @@
   // Applies the pending CHROME_CONNECTED cookie requests one by one.
   void ApplyCookieRequests();
 
   // Called when the current CHROME_CONNECTED cookie request is done.
   void FinishedApplyingCookieRequest(bool success);
 
   // Returns the cached WKWebView if it exists, or creates one if necessary.
   // Can return nil if the browser state is not active.
   WKWebView* GetWKWebView();
   // Actually creates a WKWebView. Virtual for testing.
-  virtual WKWebView* CreateWKWebView();
+  virtual WKWebView* CreateWKWebView() NS_RETURNS_RETAINED;
   // Stops any page loading in the WKWebView currently in use and releases it.
   void ResetWKWebView();
 
   // Returns whether the CHROME_CONNECTED cookie should be added to |domain|.
   // If the cookie is already on |domain|, this function will return false
   // unless |force_update_if_too_old| is true. In this case, it will return true
   // if the cookie is considered to be too old.
   bool ShouldAddChromeConnectedCookieToDomain(const std::string& domain,
                                               bool force_update_if_too_old);
 
@@ skipping 56 matching lines @@
 
   // Handlers reacting on GAIA responses with the X-Chrome-Manage-Accounts
   // header set.
   std::map<web::WebState*, std::unique_ptr<web::WebStatePolicyDecider>>
       web_state_handlers_;
 
   DISALLOW_COPY_AND_ASSIGN(AccountConsistencyService);
 };
 
 #endif  // COMPONENTS_SIGNIN_IOS_BROWSER_ACCOUNT_CONSISTENCY_SERVICE_H_