Revert of Create xfer processor backend.

src/gpu/gl/builders/GrGLProgramBuilder.h

Index: src/gpu/gl/builders/GrGLProgramBuilder.h
diff --git a/src/gpu/gl/builders/GrGLProgramBuilder.h b/src/gpu/gl/builders/GrGLProgramBuilder.h
index 69eed27252f9c37cad2588988d6a688659e0d878..1798e604db121bda747bace1d4923b89beb1e28c 100644
--- a/src/gpu/gl/builders/GrGLProgramBuilder.h
+++ b/src/gpu/gl/builders/GrGLProgramBuilder.h
@@ -14,7 +14,6 @@
 #include "../GrGLProgramDataManager.h"
 #include "../GrGLUniformHandle.h"
 #include "../GrGLGeometryProcessor.h"
-#include "../GrGLXferProcessor.h"
 #include "../../GrOptDrawState.h"
 #include "../../GrPendingFragmentStage.h"
 
@@ -112,7 +111,6 @@
 
     friend class GrGLVertexBuilder;
     friend class GrGLGeometryBuilder;
-    friend class GrGLXferBuilder;
     friend class GrGLFragmentShaderBuilder;
 };
 
@@ -172,18 +170,8 @@
      */
 };
 
-/* a specializations for XPs. Lets the user add uniforms and FS code */
-class GrGLXPBuilder : public virtual GrGLUniformBuilder {
-public:
-    virtual GrGLFPFragmentBuilder* getFragmentShaderBuilder() = 0;
-
-    /*
-     * *NOTE* NO MEMBERS ALLOWED, MULTIPLE INHERITANCE
-     */
-};
 struct GrGLInstalledProc;
 struct GrGLInstalledGeoProc;
-struct GrGLInstalledXferProc;
 struct GrGLInstalledFragProc;
 struct GrGLInstalledFragProcs;
 
@@ -195,8 +183,7 @@
  * respective builders
 */
 class GrGLProgramBuilder : public GrGLGPBuilder,
-                           public GrGLFPBuilder,
-                           public GrGLXPBuilder {
+                           public GrGLFPBuilder {
 public:
     /** Generates a shader program.
      *
@@ -296,12 +283,8 @@
     void emitAndInstallProc(const GrGeometryProcessor&,
                             const char* outColor,
                             const char* outCoverage);
-    void emitAndInstallXferProc(const GrXferProcessor&,
-                                const GrGLSLExpr4& colorIn,
-                                const GrGLSLExpr4& coverageIn);
 
     void verify(const GrGeometryProcessor&);
-    void verify(const GrXferProcessor&);
     void verify(const GrFragmentProcessor&);
     void emitSamplers(const GrProcessor&,
                       GrGLProcessor::TextureSamplerArray* outSamplers,
@@ -375,7 +358,6 @@
     int fStageIndex;
 
     GrGLInstalledGeoProc* fGeometryProcessor;
-    GrGLInstalledXferProc* fXferProcessor;
     SkAutoTUnref<GrGLInstalledFragProcs> fFragmentProcessors;
 
     const GrOptDrawState& fOptState;
@@ -407,10 +389,6 @@
 
 struct GrGLInstalledGeoProc : public GrGLInstalledProc {
     SkAutoTDelete<GrGLGeometryProcessor> fGLProc;
-};
-
-struct GrGLInstalledXferProc : public GrGLInstalledProc {
-    SkAutoTDelete<GrGLXferProcessor> fGLProc;
 };
 
 struct GrGLInstalledFragProc : public GrGLInstalledProc {