[NotForReview] Convert accelerated JPEG Decoder IPC to Mojo

content/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.cc

Index: content/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.cc
diff --git a/content/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.cc b/content/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.cc
index 0bf2749f96605a737f3ffc62184e08919c5cf6e3..4a8355c16fc9ff7281a40d385c40fe5b2213fd8f 100644
--- a/content/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.cc
+++ b/content/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.cc
@@ -17,6 +17,7 @@
 #include "build/build_config.h"
 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/gpu_data_manager.h"
 #include "content/public/common/content_switches.h"
 #include "media/base/media_switches.h"
 #include "media/base/video_frame.h"
@@ -41,10 +42,6 @@ VideoCaptureGpuJpegDecoder::~VideoCaptureGpuJpegDecoder() {
   // |decoder_| guarantees no more JpegDecodeAccelerator::Client callbacks
   // on IO thread after deletion.
   decoder_.reset();
-
-  // |gpu_channel_host_| should outlive |decoder_|, so |gpu_channel_host_|
-  // must be released after |decoder_| has been destroyed.
-  gpu_channel_host_ = nullptr;
 }
 
 void VideoCaptureGpuJpegDecoder::Initialize() {
@@ -68,11 +65,20 @@ void VideoCaptureGpuJpegDecoder::Initialize() {
     return;
   }
 
-  const scoped_refptr<base::SingleThreadTaskRunner> current_task_runner(
-      base::ThreadTaskRunnerHandle::Get());
-  BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
-                          base::Bind(&EstablishGpuChannelOnUIThread,
-                                     current_task_runner, AsWeakPtr()));
+  if (GpuDataManager::GetInstance()
+          ->GetGPUInfo()
+          .jpeg_decode_accelerator_supported) {
+    auto decoder = base::MakeUnique<media::GpuJpegDecodeAcceleratorHost>(
+        BrowserGpuChannelHostFactory::instance()->GetIOThreadTaskRunner());
+    if (decoder->Initialize(this)) {
+      decoder_ = std::move(decoder);
+    } else {
+      DLOG(ERROR) << "Failed to initialize JPEG decoder";
+    }
+  }
+
+  decoder_status_ = decoder_ ? INIT_PASSED : FAILED;
+  RecordInitDecodeUMA_Locked();
 }
 
 VideoCaptureGpuJpegDecoder::STATUS VideoCaptureGpuJpegDecoder::GetStatus()
@@ -216,58 +222,6 @@ void VideoCaptureGpuJpegDecoder::NotifyError(
   decoder_status_ = FAILED;
 }
 
-// static
-void VideoCaptureGpuJpegDecoder::EstablishGpuChannelOnUIThread(
-    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
-    base::WeakPtr<VideoCaptureGpuJpegDecoder> weak_this) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  DCHECK(BrowserGpuChannelHostFactory::instance());
-
-  BrowserGpuChannelHostFactory::instance()->EstablishGpuChannel(
-      base::Bind(&VideoCaptureGpuJpegDecoder::GpuChannelEstablishedOnUIThread,
-                 task_runner, weak_this));
-}
-
-// static
-void VideoCaptureGpuJpegDecoder::GpuChannelEstablishedOnUIThread(
-    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
-    base::WeakPtr<VideoCaptureGpuJpegDecoder> weak_this,
-    scoped_refptr<gpu::GpuChannelHost> gpu_channel_host) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
-
-  task_runner->PostTask(
-      FROM_HERE, base::Bind(&VideoCaptureGpuJpegDecoder::FinishInitialization,
-                            weak_this, std::move(gpu_channel_host)));
-}
-
-void VideoCaptureGpuJpegDecoder::FinishInitialization(
-    scoped_refptr<gpu::GpuChannelHost> gpu_channel_host) {
-  TRACE_EVENT0("gpu", "VideoCaptureGpuJpegDecoder::FinishInitialization");
-  DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
-  base::AutoLock lock(lock_);
-  if (!gpu_channel_host) {
-    LOG(ERROR) << "Failed to establish GPU channel for JPEG decoder";
-  } else if (gpu_channel_host->gpu_info().jpeg_decode_accelerator_supported) {
-    gpu_channel_host_ = std::move(gpu_channel_host);
-    scoped_refptr<base::SingleThreadTaskRunner> io_task_runner =
-        BrowserGpuChannelHostFactory::instance()->GetIOThreadTaskRunner();
-
-    int32_t route_id = gpu_channel_host_->GenerateRouteID();
-    std::unique_ptr<media::GpuJpegDecodeAcceleratorHost> decoder(
-        new media::GpuJpegDecodeAcceleratorHost(gpu_channel_host_.get(),
-                                                route_id, io_task_runner));
-    if (decoder->Initialize(this)) {
-      gpu_channel_host_->AddRouteWithTaskRunner(
-          route_id, decoder->GetReceiver(), io_task_runner);
-      decoder_ = std::move(decoder);
-    } else {
-      DLOG(ERROR) << "Failed to initialize JPEG decoder";
-    }
-  }
-  decoder_status_ = decoder_ ? INIT_PASSED : FAILED;
-  RecordInitDecodeUMA_Locked();
-}
-
 bool VideoCaptureGpuJpegDecoder::IsDecoding_Locked() const {
   lock_.AssertAcquired();
   return !decode_done_closure_.is_null();