Enhance AudioSplicer to crossfade marked splice frames.

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 d4e75410abeba58915547062d3722439fdceb3f9..8e5b5afcce83b51ba50167c49f91b2cf8a46602c 100644
--- a/media/base/decoder_buffer.cc
+++ b/media/base/decoder_buffer.cc
@@ -11,14 +11,16 @@ namespace media {
 
 DecoderBuffer::DecoderBuffer(int size)
     : size_(size),
-      side_data_size_(0) {
+      side_data_size_(0),
+      splice_preroll_(false) {
   Initialize();
 }
 
 DecoderBuffer::DecoderBuffer(const uint8* data, int size,
                              const uint8* side_data, int side_data_size)
     : size_(size),
-      side_data_size_(side_data_size) {
+      side_data_size_(side_data_size),
+      splice_preroll_(false) {
   if (!data) {
     CHECK_EQ(size_, 0);
     CHECK(!side_data);