[spelling] existance to existence

chrome/browser/chromeos/login/signin/oauth2_browsertest.cc

 // Copyright 2014 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.
 
 #include <string>
 #include <utility>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 214 matching lines @@
 
     // Try login.  Primary profile has changed.
     EXPECT_TRUE(
         TryToLogin(AccountId::FromUserEmailGaiaId(kTestEmail, kTestGaiaId),
                    kTestAccountPassword));
     Profile* profile = ProfileManager::GetPrimaryUserProfile();
 
     // Wait for the session merge to finish.
     WaitForMergeSessionCompletion(OAuth2LoginManager::SESSION_RESTORE_DONE);
 
-    // Check for existance of refresh token.
+    // Check for existence of refresh token.
     ProfileOAuth2TokenService* token_service =
           ProfileOAuth2TokenServiceFactory::GetForProfile(profile);
     EXPECT_TRUE(token_service->RefreshTokenIsAvailable(account_id));
 
     EXPECT_EQ(GetOAuthStatusFromLocalState(account_id),
               user_manager::User::OAUTH2_TOKEN_STATUS_VALID);
   }
 
   bool TryToLogin(const AccountId& account_id, const std::string& password) {
     if (!AddUserToSession(account_id, password))
@@ skipping 206 matching lines @@
   scoped_refptr<net::URLRequestContextGetter> context_;
   net::CookieList cookie_list_;
   scoped_refptr<content::MessageLoopRunner> runner_;
 
   DISALLOW_COPY_AND_ASSIGN(CookieReader);
 };
 
 // PRE_MergeSession is testing merge session for a new profile.
 IN_PROC_BROWSER_TEST_F(OAuth2Test, PRE_PRE_PRE_MergeSession) {
   StartNewUserSession(true);
-  // Check for existance of refresh token.
+  // Check for existence of refresh token.
   std::string account_id = PickAccountId(profile(), kTestGaiaId, kTestEmail);
   ProfileOAuth2TokenService* token_service =
         ProfileOAuth2TokenServiceFactory::GetForProfile(
             profile());
   EXPECT_TRUE(token_service->RefreshTokenIsAvailable(account_id));
 
   EXPECT_EQ(GetOAuthStatusFromLocalState(account_id),
             user_manager::User::OAUTH2_TOKEN_STATUS_VALID);
   scoped_refptr<CookieReader> cookie_reader(new CookieReader());
   cookie_reader->ReadCookies(profile());
@@ skipping 448 matching lines @@
 
   if (!catcher.GetNextResult()) {
     std::string message = catcher.message();
     ADD_FAILURE() << "Tests failed: " << message;
   }
 
   EXPECT_TRUE(fake_google_.IsPageRequested());
 }
 
 }  // namespace chromeos