Revert of Move DstCopy on gpu into the GrXferProcessor.

src/gpu/gl/builders/GrGLProgramBuilder.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLProgramBuilder_DEFINED
 #define GrGLProgramBuilder_DEFINED
 
@@ skipping 249 matching lines @@
                                  const char* output) SK_OVERRIDE;
 
 
     // Handles for program uniforms (other than per-effect uniforms)
     struct BuiltinUniformHandles {
         UniformHandle       fRTAdjustmentUni;
 
         // We use the render target height to provide a y-down frag coord when specifying
         // origin_upper_left is not supported.
         UniformHandle       fRTHeightUni;
+
+        // Uniforms for computing texture coords to do the dst-copy lookup
+        UniformHandle       fDstCopyTopLeftUni;
+        UniformHandle       fDstCopyScaleUni;
+        UniformHandle       fDstCopySamplerUni;
     };
 
 protected:
     typedef GrGLProgramDataManager::UniformInfo UniformInfo;
     typedef GrGLProgramDataManager::UniformInfoArray UniformInfoArray;
 
     static GrGLProgramBuilder* CreateProgramBuilder(const DrawArgs&, GrGLGpu*);
 
     GrGLProgramBuilder(GrGLGpu*, const DrawArgs&);
 
@@ skipping 106 matching lines @@
     UniformInfoArray fUniforms;
     GrGLPrimitiveProcessor::TransformsIn fCoordTransforms;
     GrGLPrimitiveProcessor::TransformsOut fOutCoords;
 
     friend class GrGLShaderBuilder;
     friend class GrGLVertexBuilder;
     friend class GrGLFragmentShaderBuilder;
     friend class GrGLGeometryBuilder;
 };
 #endif