Use safer IPC serializations in media_param_traits.cc

The custom serialization routines for these classes used base::Pickle's
serialization/deserialization routines directly rather than using the
type-deducing ReadParam/WriteParam helpers. These helpers have the bonus
of using any pre-existing ParamTraits defined for the type, so the
custom serialization doesn't have to remember to check that enum values
are in range, etc.

BUG=504205

Review URL: https://codereview.chromium.org/1211273005

Cr-Commit-Position: refs/heads/master@{#336861}

1 files changed, 0 insertions, 2 deletions

diff --git a/media/audio/android/audio_android_unittest.cc b/media/audio/android/audio_android_unittest.cc
index b8ebccf..64b3b4b 100644
--- a/media/audio/android/audio_android_unittest.cc
+++ b/media/audio/android/audio_android_unittest.cc
@@ -60,8 +60,6 @@ static std::string FormatToString(AudioParameters::Format format) {
       return std::string("AUDIO_PCM_LOW_LATENCY");
     case AudioParameters::AUDIO_FAKE:
       return std::string("AUDIO_FAKE");
-    case AudioParameters::AUDIO_LAST_FORMAT:
-      return std::string("AUDIO_LAST_FORMAT");
     default:
       return std::string();
   }