Resubmit - Use SSE2 block differ for chromoting

media/base/yuv_convert.cc

Index: media/base/yuv_convert.cc
diff --git a/media/base/yuv_convert.cc b/media/base/yuv_convert.cc
index f6e28576054fc93c40e8ca77d2730b1d2a9c86e9..2e4af1d21c2a0bd8609d10fa934247dfe59a9551 100644
--- a/media/base/yuv_convert.cc
+++ b/media/base/yuv_convert.cc
@@ -17,6 +17,7 @@
 
 #include "media/base/yuv_convert.h"
 
+#include "build/build_config.h"
 #include "media/base/cpu_features.h"
 #include "media/base/yuv_convert_internal.h"
 #include "media/base/yuv_row.h"
@@ -356,7 +357,7 @@ void ConvertRGB32ToYUV(const uint8* rgbframe,
   static void (*convert_proc)(const uint8*, uint8*, uint8*, uint8*,
                               int, int, int, int, int) = NULL;
   if (!convert_proc) {
-#ifdef __arm__
+#if defined(ARCH_CPU_ARM_FAMILY)
     // For ARM processors, always use C version.
     // TODO(hclam): Implement a NEON version.
     convert_proc = &ConvertRGB32ToYUV_C;