Revert of removing GrDrawEffect

src/gpu/gl/GrGLProgramDesc.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gl/builders/GrGLProgramBuilder.h"
 #include "GrGLProgramDesc.h"
 #include "GrBackendEffectFactory.h"
+#include "GrDrawEffect.h"
 #include "GrEffect.h"
 #include "GrGpuGL.h"
 #include "GrOptDrawState.h"
 
 #include "SkChecksum.h"
 
 bool GrGLProgramDesc::GetEffectKeyAndUpdateStats(const GrEffectStage& stage,
                                                  const GrGLCaps& caps,
                                                  bool useExplicitLocalCoords,
                                                  GrEffectKeyBuilder* b,
                                                  uint16_t* effectKeySize,
                                                  bool* setTrueIfReadsDst,
                                                  bool* setTrueIfReadsPos,
                                                  bool* setTrueIfRequiresVertexShader) {
     const GrBackendEffectFactory& factory = stage.getEffect()->getFactory();
-    const GrEffect& effect = *stage.getEffect();
-    if (effect.willReadDstColor()) {
+    GrDrawEffect drawEffect(stage, useExplicitLocalCoords);
+    if (stage.getEffect()->willReadDstColor()) {
         *setTrueIfReadsDst = true;
     }
-    if (effect.willReadFragmentPosition()) {
+    if (stage.getEffect()->willReadFragmentPosition()) {
         *setTrueIfReadsPos = true;
     }
-    if (effect.requiresVertexShader()) {
+    if (stage.getEffect()->requiresVertexShader()) {
         *setTrueIfRequiresVertexShader = true;
     }
-    factory.getGLEffectKey(effect, caps, b);
+    factory.getGLEffectKey(drawEffect, caps, b);
     size_t size = b->size();
     if (size > SK_MaxU16) {
         *effectKeySize = 0; // suppresses a warning.
         return false;
     }
     *effectKeySize = SkToU16(size);
-    if (!GrGLProgramEffects::GenEffectMetaKey(stage,
-                                              useExplicitLocalCoords,
-                                              caps,
-                                              b)) {
+    if (!GrGLProgramEffects::GenEffectMetaKey(drawEffect, caps, b)) {
         return false;
     }
     return true;
 }
 
 bool GrGLProgramDesc::Build(const GrOptDrawState& optState,
                             GrGpu::DrawType drawType,
                             GrBlendCoeff srcCoeff,
                             GrBlendCoeff dstCoeff,
                             const GrGpuGL* gpu,
@@ skipping 257 matching lines @@
     *checksum = 0;
     *checksum = SkChecksum::Compute(reinterpret_cast<uint32_t*>(fKey.begin()), keyLength);
 }
 
 GrGLProgramDesc& GrGLProgramDesc::operator= (const GrGLProgramDesc& other) {
     size_t keyLength = other.keyLength();
     fKey.reset(keyLength);
     memcpy(fKey.begin(), other.fKey.begin(), keyLength);
     return *this;
 }