Close bitstream buffer shared memory handles on Android.

media/gpu/android_video_decode_accelerator.h

Index: media/gpu/android_video_decode_accelerator.h
diff --git a/media/gpu/android_video_decode_accelerator.h b/media/gpu/android_video_decode_accelerator.h
index a9069f9b7da656c09650f9e19973695ce97f80c1..569e511cf73c2329a18af5dd2d40bf4f29d3ea4b 100644
--- a/media/gpu/android_video_decode_accelerator.h
+++ b/media/gpu/android_video_decode_accelerator.h
@@ -176,6 +176,12 @@ class MEDIA_GPU_EXPORT AndroidVideoDecodeAccelerator
     DRAIN_FOR_DESTROY,
   };
 
+  // Notification options for ClearPendingBitstreamBuffers()
+  enum BitstreamBufferNotificationType {
+    DONT_NOTIFY_CLIENT = 0,
+    NOTIFY_CLIENT = 1
+  };
+
   // Configuration info for MediaCodec.
   // This is used to shuttle configuration info between threads without needing
   // to worry about the lifetime of the AVDA instance.  All of these should not
@@ -341,6 +347,11 @@ class MEDIA_GPU_EXPORT AndroidVideoDecodeAccelerator
   // this.
   void OnDestroyingSurface(int surface_id);
 
+  // Clear any pending bitstream buffers.  This will close any shared memory
+  // handles, and, if |notify| is NOTIFY_CLIENT, notify the client that we're
+  // done with the buffer.
+  void ClearPendingBitstreamBuffers(BitstreamBufferNotificationType notify);
+
   // Return true if and only if we should use deferred rendering.
   static bool UseDeferredRenderingStrategy(
       const gpu::GpuPreferences& gpu_preferences);