Clear obsolete comment in GpuVideoDecoder.

media/filters/gpu_video_decoder.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/filters/gpu_video_decoder.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/cpu.h"
 #include "base/message_loop.h"
@@ skipping 177 matching lines @@
   }
 
   // Throw away any already-decoded, not-yet-delivered frames.
   ready_video_frames_.clear();
 
   if (!vda_.get()) {
     gvd_loop_proxy_->PostTask(FROM_HERE, closure);
     return;
   }
 
-  // VideoRendererBase::Flush() can't complete while it has a pending read to
-  // us, so we fulfill such a read here.
   if (!pending_read_cb_.is_null())
     EnqueueFrameAndTriggerFrameDelivery(VideoFrame::CreateEmptyFrame());
 
   DCHECK(pending_reset_cb_.is_null());
   pending_reset_cb_ = BindToCurrentLoop(closure);
 
   vda_loop_proxy_->PostTask(FROM_HERE, base::Bind(
       &VideoDecodeAccelerator::Reset, weak_vda_));
 }
 
@@ skipping 491 matching lines @@
 
   error_occured_ = true;
 
   if (!pending_read_cb_.is_null()) {
     base::ResetAndReturn(&pending_read_cb_).Run(kDecodeError, NULL);
     return;
   }
 }
 
 }  // namespace media