Use safer IPC serializations in media_param_traits.cc

media/audio/cras/cras_input_unittest.cc

Index: media/audio/cras/cras_input_unittest.cc
diff --git a/media/audio/cras/cras_input_unittest.cc b/media/audio/cras/cras_input_unittest.cc
index 4352b58a773805d8480e98761cac9760954f0d22..c2d10076c53f025c932ea3c10a7ca731ba0f1635 100644
--- a/media/audio/cras/cras_input_unittest.cc
+++ b/media/audio/cras/cras_input_unittest.cc
@@ -152,11 +152,10 @@ TEST_F(CrasInputStreamTest, BadBitsPerSample) {
 }
 
 TEST_F(CrasInputStreamTest, BadFormat) {
-  AudioParameters bad_format_params(AudioParameters::AUDIO_LAST_FORMAT,
-                                    kTestChannelLayout,
-                                    kTestSampleRate,
-                                    kTestBitsPerSample,
-                                    kTestFramesPerPacket);
+  AudioParameters bad_format_params(static_cast<AudioParameters::Format>(
+                                        AudioParameters::AUDIO_FORMAT_LAST + 1),
+                                    kTestChannelLayout, kTestSampleRate,
+                                    kTestBitsPerSample, kTestFramesPerPacket);
   CrasInputStream* test_stream = new CrasInputStream(
       bad_format_params, mock_manager_.get(),
       AudioManagerBase::kDefaultDeviceId);