Add support for Rec709 color space videos in software YUV convert path.

media/base/yuv_convert_unittest.cc

Index: media/base/yuv_convert_unittest.cc
diff --git a/media/base/yuv_convert_unittest.cc b/media/base/yuv_convert_unittest.cc
index 5e9d60830a5fcd167c7edcfc3a44c6dbf0ecfab2..59f9c12c0a70d73e4b7e2dce93a9b3b8efd45ab8 100644
--- a/media/base/yuv_convert_unittest.cc
+++ b/media/base/yuv_convert_unittest.cc
@@ -175,6 +175,7 @@ class YUVScaleTest : public ::testing::TestWithParam<YUVScaleTestData> {
     switch (GetParam().yuv_type) {
       case media::YV12:
       case media::YV12J:
+      case media::YV12HD:
         ReadYV12Data(&yuv_bytes_);
         break;
       case media::YV16:
@@ -192,6 +193,7 @@ class YUVScaleTest : public ::testing::TestWithParam<YUVScaleTestData> {
     switch (GetParam().yuv_type) {
       case media::YV12:
       case media::YV12J:
+      case media::YV12HD:
         return yuv_bytes_.get() + kSourceVOffset;
       case media::YV16:
         return yuv_bytes_.get() + kSourceYSize * 3 / 2;