Spelling correction: "nonexistant" -> "nonexistent".

app/sql/transaction.cc

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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 "app/sql/transaction.h"
 
 #include "app/sql/connection.h"
 #include "base/logging.h"
 
 namespace sql {
 
@@ skipping 11 matching lines @@
   if (is_open_) {
     NOTREACHED() << "Beginning a transaction twice!";
     return false;
   }
   is_open_ = connection_->BeginTransaction();
   return is_open_;
 }
 
 void Transaction::Rollback() {
   if (!is_open_) {
-    NOTREACHED() << "Attempting to roll back a nonexistant transaction. "
+    NOTREACHED() << "Attempting to roll back a nonexistent transaction. "
                  << "Did you remember to call Begin() and check its return?";
     return;
   }
   is_open_ = false;
   connection_->RollbackTransaction();
 }
 
 bool Transaction::Commit() {
   if (!is_open_) {
-    NOTREACHED() << "Attempting to commit a nonexistant transaction. "
+    NOTREACHED() << "Attempting to commit a nonexistent transaction. "
                  << "Did you remember to call Begin() and check its return?";
     return false;
   }
   is_open_ = false;
   return connection_->CommitTransaction();
 }
 
 }  // namespace sql