Use safer IPC serializations in media_param_traits.cc

content/common/media/media_param_traits.cc

Index: content/common/media/media_param_traits.cc
diff --git a/content/common/media/media_param_traits.cc b/content/common/media/media_param_traits.cc
index fc4d62efcba29d65c40b67f581e4a45ba66e78fa..698d879c2287c05c206d5118f45ee844c0498376 100644
--- a/content/common/media/media_param_traits.cc
+++ b/content/common/media/media_param_traits.cc
@@ -5,6 +5,7 @@
 #include "content/common/media/media_param_traits.h"
 
 #include "base/strings/stringprintf.h"
+#include "content/common/media/audio_messages.h"
 #include "content/common/media/video_capture_messages.h"
 #include "ipc/ipc_message_utils.h"
 #include "media/audio/audio_parameters.h"
@@ -19,34 +20,32 @@ namespace IPC {
 
 void ParamTraits<AudioParameters>::Write(Message* m,
                                          const AudioParameters& p) {
-  m->WriteInt(static_cast<int>(p.format()));
-  m->WriteInt(static_cast<int>(p.channel_layout()));
-  m->WriteInt(p.sample_rate());
-  m->WriteInt(p.bits_per_sample());
-  m->WriteInt(p.frames_per_buffer());
-  m->WriteInt(p.channels());
-  m->WriteInt(p.effects());
+  WriteParam(m, p.format());
+  WriteParam(m, p.channel_layout());
+  WriteParam(m, p.sample_rate());
+  WriteParam(m, p.bits_per_sample());
+  WriteParam(m, p.frames_per_buffer());
+  WriteParam(m, p.channels());
+  WriteParam(m, p.effects());
 }
 
 bool ParamTraits<AudioParameters>::Read(const Message* m,
                                         base::PickleIterator* iter,
                                         AudioParameters* r) {
-  int format, channel_layout, sample_rate, bits_per_sample,
-      frames_per_buffer, channels, effects;
+  AudioParameters::Format format;
+  ChannelLayout channel_layout;
+  int sample_rate, bits_per_sample, frames_per_buffer, channels, effects;
 
-  if (!iter->ReadInt(&format) ||
-      !iter->ReadInt(&channel_layout) ||
-      !iter->ReadInt(&sample_rate) ||
-      !iter->ReadInt(&bits_per_sample) ||
-      !iter->ReadInt(&frames_per_buffer) ||
-      !iter->ReadInt(&channels) ||
-      !iter->ReadInt(&effects)) {
+  if (!ReadParam(m, iter, &format) || !ReadParam(m, iter, &channel_layout) ||
+      !ReadParam(m, iter, &sample_rate) ||
+      !ReadParam(m, iter, &bits_per_sample) ||
+      !ReadParam(m, iter, &frames_per_buffer) ||
+      !ReadParam(m, iter, &channels) || !ReadParam(m, iter, &effects)) {
     return false;
   }
 
-  AudioParameters params(static_cast<AudioParameters::Format>(format),
-         static_cast<ChannelLayout>(channel_layout), channels,
-         sample_rate, bits_per_sample, frames_per_buffer, effects);
+  AudioParameters params(format, channel_layout, channels, sample_rate,
+                         bits_per_sample, frames_per_buffer, effects);
   *r = params;
   return r->IsValid();
 }