Inject CanAddURLToHistory into TopSitesImpl

components/history/core/test/database_test_utils.h

 // Copyright 2015 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.
 
 #ifndef COMPONENTS_HISTORY_CORE_HISTORY_DATABASE_TEST_UTILS_H_
 #define COMPONENTS_HISTORY_CORE_HISTORY_DATABASE_TEST_UTILS_H_
 
 #include "base/compiler_specific.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace history {
 
+// Sets |dir| to the path of the history data directory. Returns true on success
+// or false, in which case |dir| is undefined.
+WARN_UNUSED_RESULT bool GetTestDataHistoryDir(base::FilePath* dir);
+
 // Create the test database at |db_path| from the golden file at |ascii_path| in
 // the "history" subdir of the components test data dir.
 WARN_UNUSED_RESULT bool CreateDatabaseFromSQL(const base::FilePath& db_path,
                                               const char* ascii_path);
 
 }  // namespace history
 
 #endif  // COMPONENTS_HISTORY_CORE_HISTORY_DATABASE_TEST_UTILS_H_