Adding 3D lut color filter

include/gpu/GrTypesPriv.h

Index: include/gpu/GrTypesPriv.h
diff --git a/include/gpu/GrTypesPriv.h b/include/gpu/GrTypesPriv.h
index dfe415345a46326e140de5865e9f9425c1ccf761..39c6fa2fd0b68377691e6991dc3b15012cd951c5 100644
--- a/include/gpu/GrTypesPriv.h
+++ b/include/gpu/GrTypesPriv.h
@@ -24,8 +24,9 @@ enum GrSLType {
     kMat33f_GrSLType,
     kMat44f_GrSLType,
     kSampler2D_GrSLType,
+    kSampler3D_GrSLType,
 
-    kLast_GrSLType = kSampler2D_GrSLType
+    kLast_GrSLType = kSampler3D_GrSLType
 };
 static const int kGrSLTypeCount = kLast_GrSLType + 1;
 
@@ -34,7 +35,7 @@ static const int kGrSLTypeCount = kLast_GrSLType + 1;
  */
 static inline int GrSLTypeVectorCount(GrSLType type) {
     SkASSERT(type >= 0 && type < static_cast<GrSLType>(kGrSLTypeCount));
-    static const int kCounts[] = { -1, 1, 2, 3, 4, -1, -1, -1 };
+    static const int kCounts[] = { -1, 1, 2, 3, 4, -1, -1, -1, -1 };
     return kCounts[type];
 
     GR_STATIC_ASSERT(0 == kVoid_GrSLType);
@@ -45,6 +46,7 @@ static inline int GrSLTypeVectorCount(GrSLType type) {
     GR_STATIC_ASSERT(5 == kMat33f_GrSLType);
     GR_STATIC_ASSERT(6 == kMat44f_GrSLType);
     GR_STATIC_ASSERT(7 == kSampler2D_GrSLType);
+    GR_STATIC_ASSERT(8 == kSampler3D_GrSLType);
     GR_STATIC_ASSERT(SK_ARRAY_COUNT(kCounts) == kGrSLTypeCount);
 }