replace impl of SkLightingColorFilter with SkColorMatrixFilter

include/effects/SkColorMatrix.h

Index: include/effects/SkColorMatrix.h
diff --git a/include/effects/SkColorMatrix.h b/include/effects/SkColorMatrix.h
index 84a3b7c4970efff02dcd7a7a881a91948876e412..8ff45f9277289b02fd6b2776dd120bb05ee9d4a6 100644
--- a/include/effects/SkColorMatrix.h
+++ b/include/effects/SkColorMatrix.h
@@ -14,6 +14,18 @@ class SK_API SkColorMatrix {
 public:
     SkScalar    fMat[20];
 
+    enum Elem {
+        kR_Scale    = 0,
+        kG_Scale    = 6,
+        kB_Scale    = 12,
+        kA_Scale    = 18,
+        
+        kR_Trans    = 4,
+        kG_Trans    = 9,
+        kB_Trans    = 14,
+        kA_Trans    = 19,
+    };
+
     void setIdentity();
     void setScale(SkScalar rScale, SkScalar gScale, SkScalar bScale,
                   SkScalar aScale = SK_Scalar1);
@@ -21,6 +33,8 @@ public:
                   SkScalar aScale = SK_Scalar1);
     void postScale(SkScalar rScale, SkScalar gScale, SkScalar bScale,
                    SkScalar aScale = SK_Scalar1);
+    void postTranslate(SkScalar rTrans, SkScalar gTrans, SkScalar bTrans,
+                       SkScalar aTrans = 0);
 
     enum Axis {
         kR_Axis = 0,