Initialize libyuv CPU features in a thread safe manner.

media/base/media.cc

 // Copyright 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.
 
 #include "media/base/media.h"
 
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/metrics/field_trial.h"
 #include "base/trace_event/trace_event.h"
 #include "media/base/media_switches.h"
+#include "third_party/libyuv/include/libyuv.h"
 
 #if defined(OS_ANDROID)
 #include "base/android/build_info.h"
 #include "media/base/android/media_codec_util.h"
 #endif
 
 #if !defined(MEDIA_DISABLE_FFMPEG)
 #include "media/ffmpeg/ffmpeg_common.h"
 #endif
 
 namespace media {
 
 // Media must only be initialized once; use a thread-safe static to do this.
 class MediaInitializer {
  public:
   MediaInitializer() {
     TRACE_EVENT_WARMUP_CATEGORY("audio");
     TRACE_EVENT_WARMUP_CATEGORY("media");
 
+    libyuv::InitCpuFlags();
+
 #if !defined(MEDIA_DISABLE_FFMPEG)
     // Initialize CPU flags outside of the sandbox as this may query /proc for
     // details on the current CPU for NEON, VFP, etc optimizations.
     av_get_cpu_flags();
 
     // Disable logging as it interferes with layout tests.
     av_log_set_level(AV_LOG_QUIET);
 
 #if defined(ALLOCATOR_SHIM)
     // Remove allocation limit from ffmpeg, so calls go down to shim layer.
@@ skipping 40 matching lines @@
 bool HasPlatformDecoderSupport() {
   return GetMediaInstance()->has_platform_decoder_support();
 }
 
 bool PlatformHasOpusSupport() {
   return base::android::BuildInfo::GetInstance()->sdk_int() >= 21;
 }
 #endif  // defined(OS_ANDROID)
 
 }  // namespace media