Replace MessageLoopProxy with SingleThreadTaskRunner for media/filters/ + associated code.

media/filters/ffmpeg_video_decoder.cc

Index: media/filters/ffmpeg_video_decoder.cc
diff --git a/media/filters/ffmpeg_video_decoder.cc b/media/filters/ffmpeg_video_decoder.cc
index 78b9b28f7a5115ee3deb6890d2e09cc31aa401aa..78cdcd9a29babef870bc122bc666dfff70a7a90e 100644
--- a/media/filters/ffmpeg_video_decoder.cc
+++ b/media/filters/ffmpeg_video_decoder.cc
@@ -11,7 +11,7 @@
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
 #include "base/location.h"
-#include "base/message_loop/message_loop_proxy.h"
+#include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "media/base/bind_to_loop.h"
 #include "media/base/decoder_buffer.h"
@@ -55,8 +55,8 @@ static int GetThreadCount(AVCodecID codec_id) {
 }
 
 FFmpegVideoDecoder::FFmpegVideoDecoder(
-    const scoped_refptr<base::MessageLoopProxy>& message_loop)
-    : message_loop_(message_loop),
+    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner)
+    : task_runner_(task_runner),
       weak_factory_(this),
       state_(kUninitialized) {
 }
@@ -129,7 +129,7 @@ static void ReleaseVideoBufferImpl(AVCodecContext* s, AVFrame* frame) {
 
 void FFmpegVideoDecoder::Initialize(const VideoDecoderConfig& config,
                                     const PipelineStatusCB& status_cb) {
-  DCHECK(message_loop_->BelongsToCurrentThread());
+  DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK(decode_cb_.is_null());
   DCHECK(reset_cb_.is_null());
   DCHECK(!config.is_encrypted());
@@ -152,7 +152,7 @@ void FFmpegVideoDecoder::Initialize(const VideoDecoderConfig& config,
 
 void FFmpegVideoDecoder::Decode(const scoped_refptr<DecoderBuffer>& buffer,
                                 const DecodeCB& decode_cb) {
-  DCHECK(message_loop_->BelongsToCurrentThread());
+  DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK(!decode_cb.is_null());
   CHECK_NE(state_, kUninitialized);
   CHECK(decode_cb_.is_null()) << "Overlapping decodes are not supported.";
@@ -173,7 +173,7 @@ void FFmpegVideoDecoder::Decode(const scoped_refptr<DecoderBuffer>& buffer,
 }
 
 void FFmpegVideoDecoder::Reset(const base::Closure& closure) {
-  DCHECK(message_loop_->BelongsToCurrentThread());
+  DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK(reset_cb_.is_null());
   reset_cb_ = BindToCurrentLoop(closure);
 
@@ -193,7 +193,7 @@ void FFmpegVideoDecoder::DoReset() {
 }
 
 void FFmpegVideoDecoder::Stop(const base::Closure& closure) {
-  DCHECK(message_loop_->BelongsToCurrentThread());
+  DCHECK(task_runner_->BelongsToCurrentThread());
   base::ScopedClosureRunner runner(BindToCurrentLoop(closure));
 
   if (state_ == kUninitialized)
@@ -218,7 +218,7 @@ FFmpegVideoDecoder::~FFmpegVideoDecoder() {
 
 void FFmpegVideoDecoder::DecodeBuffer(
     const scoped_refptr<DecoderBuffer>& buffer) {
-  DCHECK(message_loop_->BelongsToCurrentThread());
+  DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK_NE(state_, kUninitialized);
   DCHECK_NE(state_, kDecodeFinished);
   DCHECK_NE(state_, kError);