Delete media/base/yuv_convert and dependents. Prefer libyuv.

media/base/media.cc

Index: media/base/media.cc
diff --git a/media/base/media.cc b/media/base/media.cc
index 01b1d914b1a062d7bced19ff3e0451d8a5f5dac4..8ad82ee2babf74eaeb363a93e613a83fce35103b 100644
--- a/media/base/media.cc
+++ b/media/base/media.cc
@@ -9,7 +9,6 @@
 #include "base/metrics/field_trial.h"
 #include "base/trace_event/trace_event.h"
 #include "media/base/media_switches.h"
-#include "media/base/yuv_convert.h"
 
 #if defined(OS_ANDROID)
 #include "base/android/build_info.h"
@@ -29,9 +28,6 @@ class MediaInitializer {
     TRACE_EVENT_WARMUP_CATEGORY("audio");
     TRACE_EVENT_WARMUP_CATEGORY("media");
 
-    // Perform initialization of libraries which require runtime CPU detection.
-    InitializeCPUSpecificYUVConversions();
-
 #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.