Add Rec709 YUV color space support to GrYUVtoRGBEffect.

src/gpu/effects/GrYUVtoRGBEffect.cpp

Index: src/gpu/effects/GrYUVtoRGBEffect.cpp
diff --git a/src/gpu/effects/GrYUVtoRGBEffect.cpp b/src/gpu/effects/GrYUVtoRGBEffect.cpp
index a46cb920777ca99d174ad7c2c56d482555ab869e..dd1b48082c6bd1487c835c4e0328014b6b876a48 100644
--- a/src/gpu/effects/GrYUVtoRGBEffect.cpp
+++ b/src/gpu/effects/GrYUVtoRGBEffect.cpp
@@ -54,6 +54,7 @@ public:
     public:
         static const GrGLfloat kJPEGConversionMatrix[16];
         static const GrGLfloat kRec601ConversionMatrix[16];
+        static const GrGLfloat kRec709ConversionMatrix[16];
 
         // this class always generates the same code.
         static void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuilder*) {}
@@ -91,6 +92,9 @@ public:
                 case kRec601_SkYUVColorSpace:
                     pdman.setMatrix4f(fMatrixUni, kRec601ConversionMatrix);
                     break;
+                case kRec709_SkYUVColorSpace:
+                    pdman.setMatrix4f(fMatrixUni, kRec709ConversionMatrix);
+                    break;
             }
         }
 
@@ -161,6 +165,11 @@ const GrGLfloat YUVtoRGBEffect::GLProcessor::kRec601ConversionMatrix[16] = {
     1.164f, -0.391f, -0.813f,  0.52925f,
     1.164f,  2.018f,  0.0f,   -1.08175f,
     0.0f,    0.0f,    0.0f,    1.0};
+const GrGLfloat YUVtoRGBEffect::GLProcessor::kRec709ConversionMatrix[16] = {
+    1.164f,  0.0f,    1.793f, -0.96925f,
+    1.164f, -0.213f, -0.533f,  0.30025f,
+    1.164f,  2.112f,  0.0f,   -1.12875f,
+    0.0f,    0.0f,    0.0f,    1.0f};
 }
 
 //////////////////////////////////////////////////////////////////////////////