Fix a few clang errors while trying to build tools target.

src/effects/SkDisplacementMapEffect.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 "SkDisplacementMapEffect.h"
 #include "SkFlattenableBuffers.h"
 #include "SkUnPreMultiply.h"
@@ skipping 205 matching lines @@
     virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE;
 
 private:
     static const GrEffect::CoordsType kCoordsType = GrEffect::kLocal_CoordsType;
 
     SkDisplacementMapEffect::ChannelSelectorType fXChannelSelector;
     SkDisplacementMapEffect::ChannelSelectorType fYChannelSelector;
     GrGLEffectMatrix fDisplacementEffectMatrix;
     GrGLEffectMatrix fColorEffectMatrix;
     GrGLUniformManager::UniformHandle fScaleUni;
-    GrGLUniformManager::UniformHandle fYSignColor;
-    GrGLUniformManager::UniformHandle fYSignDispl;
 
     typedef GrGLEffect INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 class GrDisplacementMapEffect : public GrEffect {
 public:
     static GrEffectRef* Create(SkDisplacementMapEffect::ChannelSelectorType xChannelSelector,
                                SkDisplacementMapEffect::ChannelSelectorType yChannelSelector,
@@ skipping 288 matching lines @@
                                                   colorTex);
 
     colorKey <<= GrGLEffectMatrix::kKeyBits;
     EffectKey xKey = displacementMap.xChannelSelector() << (2 * GrGLEffectMatrix::kKeyBits);
     EffectKey yKey = displacementMap.yChannelSelector() << (2 * GrGLEffectMatrix::kKeyBits +
                                                             SkDisplacementMapEffect::kKeyBits);
 
     return xKey | yKey | displKey | colorKey;
 }
 #endif