Revert of Move DstCopy on gpu into the GrXferProcessor.

src/gpu/gl/GrGLXferProcessor.cpp

Index: src/gpu/gl/GrGLXferProcessor.cpp
diff --git a/src/gpu/gl/GrGLXferProcessor.cpp b/src/gpu/gl/GrGLXferProcessor.cpp
deleted file mode 100644
index 20ec60d5ec1318a463c3205e3b78ff192ba7dde3..0000000000000000000000000000000000000000
--- a/src/gpu/gl/GrGLXferProcessor.cpp
+++ /dev/null
@@ -1,69 +0,0 @@
-/*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "gl/GrGLXferProcessor.h"
-
-#include "GrXferProcessor.h"
-#include "gl/builders/GrGLFragmentShaderBuilder.h"
-#include "gl/builders/GrGLProgramBuilder.h"
-
-void GrGLXferProcessor::emitCode(const EmitArgs& args) {
-    if (args.fXP.getDstCopyTexture()) {
-
-        bool topDown = kTopLeft_GrSurfaceOrigin == args.fXP.getDstCopyTexture()->origin();
-
-        GrGLFPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder();
-        const char* dstColor = fsBuilder->dstColor();
-
-        const char* dstCopyTopLeftName;
-        const char* dstCopyCoordScaleName;
-
-        fDstCopyTopLeftUni = args.fPB->addUniform(GrGLProgramBuilder::kFragment_Visibility,
-                                                   kVec2f_GrSLType,
-                                                   kDefault_GrSLPrecision,
-                                                   "DstCopyUpperLeft",
-                                                   &dstCopyTopLeftName);
-        fDstCopyScaleUni = args.fPB->addUniform(GrGLProgramBuilder::kFragment_Visibility,
-                                                kVec2f_GrSLType,
-                                                kDefault_GrSLPrecision,
-                                                "DstCopyCoordScale",
-                                                &dstCopyCoordScaleName);
-        const char* fragPos = fsBuilder->fragmentPosition();
-
-        fsBuilder->codeAppend("// Read color from copy of the destination.\n");
-        fsBuilder->codeAppendf("vec2 _dstTexCoord = (%s.xy - %s) * %s;",
-                               fragPos, dstCopyTopLeftName, dstCopyCoordScaleName);
-
-        if (!topDown) {
-            fsBuilder->codeAppend("_dstTexCoord.y = 1.0 - _dstTexCoord.y;");
-        }
-
-        fsBuilder->codeAppendf("vec4 %s = ", dstColor);
-        fsBuilder->appendTextureLookup(args.fSamplers[0], "_dstTexCoord", kVec2f_GrSLType);
-        fsBuilder->codeAppend(";");
-    }
-
-    this->onEmitCode(args);
-}
-
-void GrGLXferProcessor::setData(const GrGLProgramDataManager& pdm, const GrXferProcessor& xp) {
-    if (xp.getDstCopyTexture()) {
-        if (fDstCopyTopLeftUni.isValid()) {
-            pdm.set2f(fDstCopyTopLeftUni, static_cast<GrGLfloat>(xp.dstCopyTextureOffset().fX),
-                      static_cast<GrGLfloat>(xp.dstCopyTextureOffset().fY));
-            pdm.set2f(fDstCopyScaleUni, 1.f / xp.getDstCopyTexture()->width(),
-                      1.f / xp.getDstCopyTexture()->height());
-        } else {
-            SkASSERT(!fDstCopyScaleUni.isValid());
-        }
-    } else {
-        SkASSERT(!fDstCopyTopLeftUni.isValid());
-        SkASSERT(!fDstCopyScaleUni.isValid());
-    }
-    this->onSetData(pdm, xp);
-}
-