Revert of Create xfer processor backend.

include/gpu/effects/GrPorterDuffXferProcessor.h

Index: include/gpu/effects/GrPorterDuffXferProcessor.h
diff --git a/include/gpu/effects/GrPorterDuffXferProcessor.h b/include/gpu/effects/GrPorterDuffXferProcessor.h
index 26800c7f8f9387957234323f35a5b14229fc6e10..0ddfcdcd2a9594056bb12d469d5e85b5e0ca84bb 100644
--- a/include/gpu/effects/GrPorterDuffXferProcessor.h
+++ b/include/gpu/effects/GrPorterDuffXferProcessor.h
@@ -26,44 +26,20 @@
 
     virtual const char* name() const { return "Porter Duff"; }
 
-    void getGLProcessorKey(const GrGLCaps& caps, GrProcessorKeyBuilder* b) const SK_OVERRIDE;
+    virtual void getGLProcessorKey(const GrGLCaps& caps,
+                                   GrProcessorKeyBuilder* b) const SK_OVERRIDE;
 
-    GrGLXferProcessor* createGLInstance() const SK_OVERRIDE;
+    virtual GrGLFragmentProcessor* createGLInstance() const SK_OVERRIDE;
 
-    virtual bool hasSecondaryOutput() const SK_OVERRIDE;
+    virtual GrXferProcessor::OptFlags getOptimizations(const GrProcOptInfo& colorPOI,
+                                                       const GrProcOptInfo& coveragePOI,
+                                                       bool isCoverageDrawing,
+                                                       bool colorWriteDisabled,
+                                                       bool doesStencilWrite,
+                                                       GrColor* color,
+                                                       uint8_t* coverage) SK_OVERRIDE;
 
-    ///////////////////////////////////////////////////////////////////////////
-    /// @name Stage Output Types
-    ////
-
-    enum SecondaryOutputType {
-        // There is no secondary output
-        kNone_SecondaryOutputType,
-        // Writes coverage as the secondary output. Only set if dual source blending is supported
-        // and primary output is kModulate.
-        kCoverage_SecondaryOutputType,
-        // Writes coverage * (1 - colorA) as the secondary output. Only set if dual source blending
-        // is supported and primary output is kModulate.
-        kCoverageISA_SecondaryOutputType,
-        // Writes coverage * (1 - colorRGBA) as the secondary output. Only set if dual source
-        // blending is supported and primary output is kModulate.
-        kCoverageISC_SecondaryOutputType,
-
-        kSecondaryOutputTypeCnt,
-    };
-
-    SecondaryOutputType secondaryOutputType() const { return fSecondaryOutputType; }
-
-    GrXferProcessor::OptFlags getOptimizations(const GrProcOptInfo& colorPOI,
-                                               const GrProcOptInfo& coveragePOI,
-                                               bool isCoverageDrawing,
-                                               bool colorWriteDisabled,
-                                               bool doesStencilWrite,
-                                               GrColor* color,
-                                               uint8_t* coverage,
-                                               const GrDrawTargetCaps& caps) SK_OVERRIDE;
-
-    void getBlendInfo(GrXferProcessor::BlendInfo* blendInfo) const SK_OVERRIDE {
+    virtual void getBlendInfo(GrXferProcessor::BlendInfo* blendInfo) const SK_OVERRIDE {
         blendInfo->fSrcBlend = fSrcBlend;
         blendInfo->fDstBlend = fDstBlend;
         blendInfo->fBlendConstant = fBlendConstant;
@@ -72,34 +48,21 @@
 private:
     GrPorterDuffXferProcessor(GrBlendCoeff srcBlend, GrBlendCoeff dstBlend, GrColor constant);
 
-    bool onIsEqual(const GrXferProcessor& xpBase) const SK_OVERRIDE {
-        const GrPorterDuffXferProcessor& xp = xpBase.cast<GrPorterDuffXferProcessor>();
+    virtual bool onIsEqual(const GrFragmentProcessor& fpBase) const SK_OVERRIDE {
+        const GrPorterDuffXferProcessor& xp = fpBase.cast<GrPorterDuffXferProcessor>();
         if (fSrcBlend != xp.fSrcBlend ||
             fDstBlend != xp.fDstBlend ||
-            fBlendConstant != xp.fBlendConstant ||
-            fSecondaryOutputType != xp.fSecondaryOutputType) {
+            fBlendConstant != xp.fBlendConstant) {
             return false;
         }
         return true;
     }
 
-    void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVERRIDE;
-
-    GrXferProcessor::OptFlags internalGetOptimizations(const GrProcOptInfo& colorPOI,
-                                                       const GrProcOptInfo& coveragePOI,
-                                                       bool isCoverageDrawing,
-                                                       bool colorWriteDisabled,
-                                                       bool doesStencilWrite,
-                                                       GrColor* color,
-                                                       uint8_t* coverage);
-
-    void calcOutputTypes(GrXferProcessor::OptFlags blendOpts, const GrDrawTargetCaps& caps,
-                         bool isCoverageDrawing, bool readDst);
+    virtual void onComputeInvariantOutput(GrInvariantOutput* inout) const SK_OVERRIDE;
 
     GrBlendCoeff fSrcBlend;
     GrBlendCoeff fDstBlend;
     GrColor      fBlendConstant;
-    SecondaryOutputType fSecondaryOutputType;
 
     typedef GrXferProcessor INHERITED;
 };
@@ -144,8 +107,6 @@
         return (fSrcCoeff == xpf.fSrcCoeff && fDstCoeff == xpf.fDstCoeff);
     }
 
-    GR_DECLARE_XP_FACTORY_TEST;
-
     GrBlendCoeff fSrcCoeff;
     GrBlendCoeff fDstCoeff;