Fix some grammar in chrome/browser/printing

chrome/browser/printing/cloud_print/cloud_print_setup_flow.h

 // Copyright (c) 2012 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 CHROME_BROWSER_PRINTING_CLOUD_PRINT_CLOUD_PRINT_SETUP_FLOW_H_
 #define CHROME_BROWSER_PRINTING_CLOUD_PRINT_CLOUD_PRINT_SETUP_FLOW_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 105 matching lines @@
 
   // The following methods control which iframe is visible.
   void ShowGaiaLogin(const base::DictionaryValue& args);
   void ShowGaiaSuccessAndSettingUp();
   void ShowGaiaFailed(const GoogleServiceAuthError& error);
   void ShowSetupDone();
   void ExecuteJavascriptInIFrame(const string16& iframe_xpath,
                                  const string16& js);
 
   // Pointer to the Web UI. This is provided by CloudPrintSetupMessageHandler
-  // when attached. We do not own the pointer, instead WebUI owns it's delegate
+  // when attached. We do not own the pointer, instead WebUI owns its delegate
   // (us) and controls our lifetime.
   content::WebUI* web_ui_;
 
   // The args to pass to the initial page.
   std::string dialog_start_args_;
   Profile* profile_;
 
   // Fetcher to obtain the Cloud Print token.
   scoped_ptr<GaiaAuthFetcher> authenticator_;
   std::string login_;
   std::string lsid_;
 
   // The last captcha or error state encountered.
   GoogleServiceAuthError last_auth_error_;
 
   // Are we in the done state?
   bool setup_done_;
 
   // Handle to the ServiceProcessControl which talks to the service process.
   ServiceProcessControl* process_control_;
   base::WeakPtr<Delegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(CloudPrintSetupFlow);
 };
 
 #endif  // CHROME_BROWSER_PRINTING_CLOUD_PRINT_CLOUD_PRINT_SETUP_FLOW_H_