Add MediaCodecAudioDecoder implementation

media/base/decoder_buffer.cc

Index: media/base/decoder_buffer.cc
diff --git a/media/base/decoder_buffer.cc b/media/base/decoder_buffer.cc
index 621ba00539a3d3a4d55611f7290d2a958aeab9fc..e9300956565b03f615aa0f5e24e5be2eae106b3a 100644
--- a/media/base/decoder_buffer.cc
+++ b/media/base/decoder_buffer.cc
@@ -78,20 +78,25 @@ scoped_refptr<DecoderBuffer> DecoderBuffer::CreateEOSBuffer() {
   return make_scoped_refptr(new DecoderBuffer(NULL, 0, NULL, 0));
 }
 
-std::string DecoderBuffer::AsHumanReadableString() {
+std::string DecoderBuffer::AsHumanReadableString(int flags) {
   if (end_of_stream()) {
     return "end of stream";
   }
 
   std::ostringstream s;
-  s << "timestamp: " << timestamp_.InMicroseconds()
-    << " duration: " << duration_.InMicroseconds()
-    << " size: " << size_
-    << " side_data_size: " << side_data_size_
-    << " is_key_frame: " << is_key_frame_
-    << " encrypted: " << (decrypt_config_ != NULL)
-    << " discard_padding (ms): (" << discard_padding_.first.InMilliseconds()
-    << ", " << discard_padding_.second.InMilliseconds() << ")";
+  if ((flags & kShortFormat) == kShortFormat) {
+    s << "timestamp: " << timestamp_;
+    if (is_key_frame_)
+      s << " KEY";
+  } else {
+    s << "timestamp: " << timestamp_.InMicroseconds()
+      << " duration: " << duration_.InMicroseconds() << " size: " << size_
+      << " side_data_size: " << side_data_size_
+      << " is_key_frame: " << is_key_frame_
+      << " encrypted: " << (decrypt_config_ != NULL)
+      << " discard_padding (ms): (" << discard_padding_.first.InMilliseconds()
+      << ", " << discard_padding_.second.InMilliseconds() << ")";
+  }
 
   if (decrypt_config_)
     s << " decrypt:" << (*decrypt_config_);