Add correct support for videos with YUVJ420P color format, in the software conversion path.

media/base/yuv_convert.h

Index: media/base/yuv_convert.h
diff --git a/media/base/yuv_convert.h b/media/base/yuv_convert.h
index 8f64c79689a3dfaf33a1944d23d4e1ac66655f6b..cf13edb17ab285ff5e74e52e2a26fce2f7a5cdff 100644
--- a/media/base/yuv_convert.h
+++ b/media/base/yuv_convert.h
@@ -7,6 +7,7 @@
 
 #include "base/basictypes.h"
 #include "media/base/media_export.h"
+#include "media/base/simd/yuv_to_rgb_table.h"
 
 // Visual Studio 2010 does not support MMX intrinsics on x64.
 // Some win64 yuv_convert code paths use SSE+MMX yasm, so without rewriting
@@ -22,12 +23,18 @@
 namespace media {
 
 // Type of YUV surface.
-// The value of these enums matter as they are used to shift vertical indices.
 enum YUVType {
-  YV16 = 0,  // YV16 is half width and full height chroma channels.
-  YV12 = 1,  // YV12 is half width and half height chroma channels.
+  YV16  = 0,  // YV16 is half width and full height chroma channels.
+  YV12  = 1,  // YV12 is half width and half height chroma channels.
+  YV12J = 2,  // YV12J is the same as YV12, but in JPEG color range.
 };
 
+// Get the appropriate value to bitshift by for vertical indices.
+MEDIA_EXPORT int GetVerticalShift(YUVType type);
+
+// Get the appropriate lookup table for a given YUV format.
+MEDIA_EXPORT const int16 (&GetLookupTable(YUVType type))[1024][4];
+
 // Mirror means flip the image horizontally, as in looking in a mirror.
 // Rotate happens after mirroring.
 enum Rotate {