Avoid constexpr compiler bug in VS 2017

media/filters/vpx_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/vpx_video_decoder.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 34 matching lines @@
 #include "third_party/libvpx/source/libvpx/vpx/vp8dx.h"
 #include "third_party/libvpx/source/libvpx/vpx/vpx_decoder.h"
 #include "third_party/libvpx/source/libvpx/vpx/vpx_frame_buffer.h"
 }
 
 #include "third_party/libyuv/include/libyuv/convert.h"
 #include "third_party/libyuv/include/libyuv/planar_functions.h"
 
 namespace media {
 
+constexpr base::TimeDelta kStaleFrameLimit = base::TimeDelta::FromSeconds(10);
+
 // High resolution VP9 decodes can block the main task runner for too long,
 // preventing demuxing, audio decoding, and other control activities.  In those
 // cases share a thread per process for higher resolution decodes.
 //
 // All calls into this class must be done on the per-process media thread.
 class VpxOffloadThread {
  public:
   VpxOffloadThread() : offload_thread_("VpxOffloadThread") {}
   ~VpxOffloadThread() {}
 
@@ skipping 324 matching lines @@
     EraseUnusedResources();
     return;
   }
 
   const base::TimeTicks now = tick_clock_->NowTicks();
   if (!frame_buffer->ref_cnt)
     frame_buffer->last_use_time = now;
 
   base::EraseIf(
       frame_buffers_, [now](const std::unique_ptr<VP9FrameBuffer>& buf) {
-        constexpr base::TimeDelta kStaleFrameLimit =
-            base::TimeDelta::FromSeconds(10);
         return !buf->ref_cnt && now - buf->last_use_time > kStaleFrameLimit;
       });
 }
 
 VpxVideoDecoder::VpxVideoDecoder()
     : state_(kUninitialized),
       vpx_codec_(nullptr),
       vpx_codec_alpha_(nullptr),
       weak_factory_(this) {
   thread_checker_.DetachFromThread();
@@ skipping 525 matching lines @@
       (*video_frame)->visible_data(VideoFrame::kUPlane),
       (*video_frame)->stride(VideoFrame::kUPlane),
       (*video_frame)->visible_data(VideoFrame::kVPlane),
       (*video_frame)->stride(VideoFrame::kVPlane), coded_size.width(),
       coded_size.height());
 
   return true;
 }
 
 }  // namespace media