media: Simplify {Audio|Video}Decoder initialization callback.

media/filters/decoder_selector.cc

Index: media/filters/decoder_selector.cc
diff --git a/media/filters/decoder_selector.cc b/media/filters/decoder_selector.cc
index 555a411bd760f97253bbe7a64e92637aea4a06d3..44630010669a608f05243e1f1ca3a984ac7fb98b 100644
--- a/media/filters/decoder_selector.cc
+++ b/media/filters/decoder_selector.cc
@@ -119,12 +119,11 @@ void DecoderSelector<StreamType>::SelectDecoder(
 }
 
 template <DemuxerStream::Type StreamType>
-void DecoderSelector<StreamType>::DecryptingDecoderInitDone(
-    PipelineStatus status) {
+void DecoderSelector<StreamType>::DecryptingDecoderInitDone(bool success) {
   DVLOG(2) << __FUNCTION__;
   DCHECK(task_runner_->BelongsToCurrentThread());
 
-  if (status == PIPELINE_OK) {
+  if (success) {
     base::ResetAndReturn(&select_decoder_cb_)
         .Run(decoder_.Pass(), scoped_ptr<DecryptingDemuxerStream>());
     return;
@@ -179,11 +178,11 @@ void DecoderSelector<StreamType>::InitializeDecoder() {
 }
 
 template <DemuxerStream::Type StreamType>
-void DecoderSelector<StreamType>::DecoderInitDone(PipelineStatus status) {
+void DecoderSelector<StreamType>::DecoderInitDone(bool success) {
   DVLOG(2) << __FUNCTION__;
   DCHECK(task_runner_->BelongsToCurrentThread());
 
-  if (status != PIPELINE_OK) {
+  if (!success) {
     decoder_.reset();
     InitializeDecoder();
     return;