Changed SkLightingShader API to take in a shader as color source

samplecode/SampleLitAtlas.cpp

Index: samplecode/SampleLitAtlas.cpp
diff --git a/samplecode/SampleLitAtlas.cpp b/samplecode/SampleLitAtlas.cpp
index 36955a16d851a3174cb8306ca97f611ff5933509..ae1e7237a5c7fd1fe226982f9fd4904c86b2fa1b 100644
--- a/samplecode/SampleLitAtlas.cpp
+++ b/samplecode/SampleLitAtlas.cpp
@@ -7,7 +7,7 @@
 
 #include "SampleCode.h"
 #include "SkAnimTimer.h"
-#include "SkView.h"
+#include "SkBitmapProcShader.h"
 #include "SkCanvas.h"
 #include "SkDrawable.h"
 #include "SkLightingShader.h"
@@ -15,6 +15,7 @@
 #include "SkNormalSource.h"
 #include "SkRandom.h"
 #include "SkRSXform.h"
+#include "SkView.h"
 
 #include "sk_tool_utils.h"
 
@@ -135,8 +136,10 @@ protected:
 
             sk_sp<SkNormalSource> normalSource = SkNormalSource::MakeMap(fAtlas, invNormRotation,
                                                                          &normalMat);
-            paint.setShader(SkLightingShader::Make(fAtlas, fLights, &diffMat,
-                                                   std::move(normalSource)));
+            sk_sp<SkShader> diffuseShader = SkBitmapProcShader::MakeBitmapShader(fAtlas,
+                    SkShader::kClamp_TileMode, SkShader::kClamp_TileMode, &diffMat);
+            paint.setShader(SkLightingShader::Make(std::move(diffuseShader),
+                    std::move(normalSource), fLights));
 
             canvas->save();
                 canvas->setMatrix(m);