[spelling] existance to existence

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

Index: chrome/browser/chromeos/login/signin/oauth2_browsertest.cc
diff --git a/chrome/browser/chromeos/login/signin/oauth2_browsertest.cc b/chrome/browser/chromeos/login/signin/oauth2_browsertest.cc
index 3939fc4013f5c0f20c69787af7902d9ec17312ae..0364a12cf49241366c1b0bebc29574829c7562ad 100644
--- a/chrome/browser/chromeos/login/signin/oauth2_browsertest.cc
+++ b/chrome/browser/chromeos/login/signin/oauth2_browsertest.cc
@@ -232,7 +232,7 @@ class OAuth2Test : public OobeBaseTest {
     // 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));
@@ -459,7 +459,7 @@ class CookieReader : public base::RefCountedThreadSafe<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(