Teach BindToLoop to create callbacks that accept scoped parameters.

content/common/gpu/media/vaapi_video_decode_accelerator.cc

Index: content/common/gpu/media/vaapi_video_decode_accelerator.cc
diff --git a/content/common/gpu/media/vaapi_video_decode_accelerator.cc b/content/common/gpu/media/vaapi_video_decode_accelerator.cc
index c1568d819b7015954f45f25adc5de2d0311508d5..8a99064e7baca5ba60f913cd15d5e04c0e10b1d9 100644
--- a/content/common/gpu/media/vaapi_video_decode_accelerator.cc
+++ b/content/common/gpu/media/vaapi_video_decode_accelerator.cc
@@ -112,13 +112,10 @@ bool VaapiVideoDecodeAccelerator::Initialize(
 
 void VaapiVideoDecodeAccelerator::SubmitDecode(
     int32 output_id,
-    std::queue<VABufferID>* va_bufs_ptr,
-    std::queue<VABufferID>* slice_bufs_ptr) {
+    scoped_ptr<std::queue<VABufferID> > va_bufs,
+    scoped_ptr<std::queue<VABufferID> > slice_bufs) {
   DCHECK_EQ(message_loop_, MessageLoop::current());
 
-  scoped_ptr<std::queue<VABufferID> > va_bufs(va_bufs_ptr);
-  scoped_ptr<std::queue<VABufferID> > slice_bufs(slice_bufs_ptr);
-
   TRACE_EVENT1("Video Decoder", "VAVDA::Decode", "output_id", output_id);
 
   // Handle Destroy() arriving while pictures are queued for output.