119   base::FilePath filename;  in GetKey()  local
120   TEST_AND_RETURN_FALSE(GetFileNameForKey(key, &filename));  in GetKey()
121   if (!base::ReadFileToString(filename, value)) {  in GetKey()
129   base::FilePath filename;  in SetKey()  local
130   TEST_AND_RETURN_FALSE(GetFileNameForKey(key, &filename));  in SetKey()
131   if (!base::DirectoryExists(filename.DirName())) {  in SetKey()
134     TEST_AND_RETURN_FALSE(base::CreateDirectory(filename.DirName()));  in SetKey()
136   TEST_AND_RETURN_FALSE(base::WriteFile(filename, value.data(), value.size()) ==  in SetKey()
142   base::FilePath filename;  in KeyExists()  local
143   TEST_AND_RETURN_FALSE(GetFileNameForKey(key, &filename));  in KeyExists()
144   return base::PathExists(filename);  in KeyExists()
148   base::FilePath filename;  in DeleteKey()  local
149   TEST_AND_RETURN_FALSE(GetFileNameForKey(key, &filename));  in DeleteKey()
150   TEST_AND_RETURN_FALSE(base::DeleteFile(filename, false));  in DeleteKey()
155                                            base::FilePath* filename) const {  in GetFileNameForKey()
163   *filename = prefs_dir_.Append(key);  in GetFileNameForKey()