Add onGetBlendInfo to GrXferProcessor

src/gpu/effects/GrPorterDuffXferProcessor.cpp

Index: src/gpu/effects/GrPorterDuffXferProcessor.cpp
diff --git a/src/gpu/effects/GrPorterDuffXferProcessor.cpp b/src/gpu/effects/GrPorterDuffXferProcessor.cpp
index 2735ac3c22eceefc9049a382c4c751a746a1d23b..77b7fcaac00c5e52a6d433124d513ea5ca8f208d 100644
--- a/src/gpu/effects/GrPorterDuffXferProcessor.cpp
+++ b/src/gpu/effects/GrPorterDuffXferProcessor.cpp
@@ -90,7 +90,16 @@ public:
                                                GrColor* overrideColor,
                                                const GrDrawTargetCaps& caps) override;
 
-    void getBlendInfo(GrXferProcessor::BlendInfo* blendInfo) const override {
+    GrBlendCoeff getSrcBlend() const { return fSrcBlend; }
+    GrBlendCoeff getDstBlend() const { return fDstBlend; }
+
+private:
+    PorterDuffXferProcessor(GrBlendCoeff srcBlend, GrBlendCoeff dstBlend, GrColor constant,
+                            const GrDeviceCoordTexture* dstCopy, bool willReadDstColor);
+
+    void onGetGLProcessorKey(const GrGLCaps& caps, GrProcessorKeyBuilder* b) const override;
+
+    void onGetBlendInfo(GrXferProcessor::BlendInfo* blendInfo) const override {
         if (!this->willReadDstColor()) {
             blendInfo->fSrcBlend = fSrcBlend;
             blendInfo->fDstBlend = fDstBlend;
@@ -101,15 +110,6 @@ public:
         blendInfo->fBlendConstant = fBlendConstant;
     }
 
-    GrBlendCoeff getSrcBlend() const { return fSrcBlend; }
-    GrBlendCoeff getDstBlend() const { return fDstBlend; }
-
-private:
-    PorterDuffXferProcessor(GrBlendCoeff srcBlend, GrBlendCoeff dstBlend, GrColor constant,
-                            const GrDeviceCoordTexture* dstCopy, bool willReadDstColor);
-
-    void onGetGLProcessorKey(const GrGLCaps& caps, GrProcessorKeyBuilder* b) const override;
-
     bool onIsEqual(const GrXferProcessor& xpBase) const override {
         const PorterDuffXferProcessor& xp = xpBase.cast<PorterDuffXferProcessor>();
         if (fSrcBlend != xp.fSrcBlend ||