introduce chrome/browser/common directory and move url_database(and its dependencies)

chrome/browser/history/visit_database_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 "base/file_path.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/scoped_temp_dir.h"
 #include "base/string_util.h"
-#include "chrome/browser/history/url_database.h"
+#include "chrome/browser/common/url_database/url_database.h"
 #include "chrome/browser/history/visit_database.h"
 #include "sql/connection.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 using base::Time;
 using base::TimeDelta;
 
 namespace history {
 
@@ skipping 262 matching lines @@
       url_id, Time::Now(), 2, content::PAGE_TRANSITION_TYPED, 0);
   visit_info3.is_indexed = true;
   ASSERT_TRUE(AddVisit(&visit_info3, SOURCE_SYNCED));
   EXPECT_TRUE(GetVisitsForURL(url_id, &visits));
   EXPECT_EQ(static_cast<size_t>(3), visits.size());
   EXPECT_TRUE(GetIndexedVisitsForURL(url_id, &visits));
   EXPECT_EQ(static_cast<size_t>(1), visits.size());
 }
 
 }  // namespace history