Run VDA::Decode on GPU IO thread if VDA supports it.

content/common/gpu/media/android_video_decode_accelerator.cc

Index: content/common/gpu/media/android_video_decode_accelerator.cc
diff --git a/content/common/gpu/media/android_video_decode_accelerator.cc b/content/common/gpu/media/android_video_decode_accelerator.cc
index ac48abc3a60e65d9a22a3e735336f7360c61fd99..9a10fc625c4d9c2a54fba282e5950614fe685df6 100644
--- a/content/common/gpu/media/android_video_decode_accelerator.cc
+++ b/content/common/gpu/media/android_video_decode_accelerator.cc
@@ -48,7 +48,8 @@ AndroidVideoDecodeAccelerator::AndroidVideoDecodeAccelerator(
     media::VideoDecodeAccelerator::Client* client,
     const base::WeakPtr<gpu::gles2::GLES2Decoder> decoder,
     const base::Callback<bool(void)>& make_context_current)
-    : client_(client),
+    : child_message_loop_(base::MessageLoop::current()),
+      client_(client),
       make_context_current_(make_context_current),
       codec_(media::kCodecH264),
       state_(NO_ERROR),
@@ -329,6 +330,15 @@ void AndroidVideoDecodeAccelerator::SendCurrentSurfaceToClient(
 
 void AndroidVideoDecodeAccelerator::Decode(
     const media::BitstreamBuffer& bitstream_buffer) {
+  if (!child_message_loop_->BelongsToCurrentThread) {

[Ami GONE FROM CHROMIUM, 2013/08/26 17:20:03]

Can you add a TODO to make this safe from the IO thread to each of the VDA impls
you added this shim to?

[piman, 2013/08/27 04:01:20]

You're missing the () to BelongsToCurrentThread().

[wuchengli, 2013/08/27 12:32:24]

This part of change has been reverted.

[wuchengli, 2013/08/27 12:32:24]

I added CanDecodeOnIOThread and this part of code has been reverted.

+    child_message_loop_->PostTask(
+        FROM_HERE,
+        base::Bind(&AndroidVideoDecodeAccelerator::Decode,
+                   base::AsWeakPtr(this),
+                   bitstream_buffer));
+    return;
+  }
+
   DCHECK(thread_checker_.CalledOnValidThread());
   if (bitstream_buffer.id() != -1 && bitstream_buffer.size() == 0) {
     base::MessageLoop::current()->PostTask(FROM_HERE, base::Bind(