message: Migrate to MockDictionary in converter_test and predictor_test.
diff: namespace mozc {
  namespace {
  -using ::mozc::dictionary::DictionaryMock;
  +using ::mozc::dictionary::MockDictionary;
  using ::mozc::dictionary::SuppressionDictionary;
  using ::testing::_;
  using ::testing::AtMost;
  @@ -214,7 +214,7 @@ TEST_F(MobilePredictorTest, CallPredictorsForMobilePrediction) {
  }
  TEST_F(MobilePredictorTest, CallPredictorsForMobilePartialPrediction) {
  - DictionaryMock dictionary_mock;
  + MockDictionary dictionary_mock;
  testing::MockDataManager data_manager;
  const dictionary::PosMatcher pos_matcher(data_manager.GetPosMatcherData());
  const SuppressionDictionary suppression_dictionary;
  