Move WebData component unittests to //components/webdata.

components/webdata/autofill/web_database_migration_unittest.cc

 // 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.
 
 #include <string>
 
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/guid.h"
 #include "base/message_loop.h"
@@ skipping 1971 matching lines @@
     ASSERT_TRUE(sql::MetaTable::DoesTableExist(&connection));
 
     // Check version.
     EXPECT_EQ(kCurrentTestedVersionNumber, VersionFromConnection(&connection));
 
     // A new column should have been created.
     EXPECT_TRUE(connection.DoesColumnExist("keywords",
                                            "search_terms_replacement_key"));
   }
 }