Never reuse a VideoToolbox decompression session.

content/common/gpu/media/vt_video_decode_accelerator.h

Index: content/common/gpu/media/vt_video_decode_accelerator.h
diff --git a/content/common/gpu/media/vt_video_decode_accelerator.h b/content/common/gpu/media/vt_video_decode_accelerator.h
index c7289684351d47abc51caac51b6dcc15d1cc2456..6cd404d3e9402902cc4ca9443e4898cc3d334f88 100644
--- a/content/common/gpu/media/vt_video_decode_accelerator.h
+++ b/content/common/gpu/media/vt_video_decode_accelerator.h
@@ -97,7 +97,10 @@ class VTVideoDecodeAccelerator : public media::VideoDecodeAccelerator {
     // Relative presentation order of this frame (see AVC spec).
     int32_t pic_order_cnt;
 
-    // Nnumber of frames after this one in decode order that can appear before
+    // Whether this frame is an IDR.
+    bool is_idr;
+
+    // Number of frames after this one in decode order that can appear before
     // before it in presentation order.
     int32_t reorder_window;