Add offset support to BitstreamBuffer.

content/common/gpu/media/gpu_video_decode_accelerator.cc

Index: content/common/gpu/media/gpu_video_decode_accelerator.cc
diff --git a/content/common/gpu/media/gpu_video_decode_accelerator.cc b/content/common/gpu/media/gpu_video_decode_accelerator.cc
index c0ef5473f7ccacf36a987cc0e17f626253341796..7ce14e950be746c9e74805fbc5b68e1fb0143bc2 100644
--- a/content/common/gpu/media/gpu_video_decode_accelerator.cc
+++ b/content/common/gpu/media/gpu_video_decode_accelerator.cc
@@ -486,6 +486,17 @@ void GpuVideoDecodeAccelerator::OnSetCdm(int cdm_id) {
   video_decode_accelerator_->SetCdm(cdm_id);
 }
 
+void GpuVideoDecodeAccelerator::CallOrPostNotifyError(
+    media::VideoDecodeAccelerator::Error error) {
+  if (child_task_runner_->BelongsToCurrentThread()) {
+    NotifyError(error);
+  } else {
+    child_task_runner_->PostTask(
+        FROM_HERE, base::Bind(&GpuVideoDecodeAccelerator::NotifyError,
+                              base::Unretained(this), error));
+  }
+}
+
 // Runs on IO thread if video_decode_accelerator_->CanDecodeOnIOThread() is
 // true, otherwise on the main thread.
 void GpuVideoDecodeAccelerator::OnDecode(