Fix broken SurfaceView usage on < M devices.

media/gpu/android_video_decode_accelerator.h

 // Copyright (c) 2013 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.
 
 #ifndef MEDIA_GPU_ANDROID_VIDEO_DECODE_ACCELERATOR_H_
 #define MEDIA_GPU_ANDROID_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <stdint.h>
 
 #include <list>
@@ skipping 365 matching lines @@
   // when the EOS buffer is received.
   bool codec_needs_reset_;
 
   // True if surface creation and |picture_buffer_manager_| initialization has
   // been defered until the first Decode() call.
   bool defer_surface_creation_;
 
   // Has a value if a SetSurface() call has occurred and a new surface should be
   // switched to when possible. Cleared during OnDestroyingSurface() and if all
   // pictures have been rendered in DequeueOutput().
-  int32_t surface_id_;
   base::Optional<int32_t> pending_surface_id_;
 
   // Copy of the VDA::Config we were given.
   Config config_;
 
   OnDestroyingSurfaceCallback on_destroying_surface_cb_;
 
   // WeakPtrFactory for posting tasks back to |this|.
   base::WeakPtrFactory<AndroidVideoDecodeAccelerator> weak_this_factory_;
 
   friend class AndroidVideoDecodeAcceleratorTest;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_GPU_ANDROID_VIDEO_DECODE_ACCELERATOR_H_