Allow GrGLEffects to produce variable length keys.

src/effects/SkMagnifierImageFilter.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
 #include "SkMagnifierImageFilter.h"
 #include "SkColorPriv.h"
@@ skipping 79 matching lines @@
 
 // For brevity
 typedef GrGLUniformManager::UniformHandle UniformHandle;
 
 class GrGLMagnifierEffect : public GrGLEffect {
 public:
     GrGLMagnifierEffect(const GrBackendEffectFactory&, const GrDrawEffect&);
 
     virtual void emitCode(GrGLShaderBuilder*,
                           const GrDrawEffect&,
-                          EffectKey,
+                          const GrEffectKey&,
                           const char* outputColor,
                           const char* inputColor,
                           const TransformedCoordsArray&,
                           const TextureSamplerArray&) SK_OVERRIDE;
 
     virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE;
 
 private:
     UniformHandle       fOffsetVar;
     UniformHandle       fInvZoomVar;
     UniformHandle       fInvInsetVar;
 
     typedef GrGLEffect INHERITED;
 };
 
 GrGLMagnifierEffect::GrGLMagnifierEffect(const GrBackendEffectFactory& factory, const GrDrawEffect&)
     : INHERITED(factory) {
 }
 
 void GrGLMagnifierEffect::emitCode(GrGLShaderBuilder* builder,
                                    const GrDrawEffect&,
-                                   EffectKey key,
+                                   const GrEffectKey& key,
                                    const char* outputColor,
                                    const char* inputColor,
                                    const TransformedCoordsArray& coords,
                                    const TextureSamplerArray& samplers) {
     SkString coords2D = builder->ensureFSCoords2D(coords, 0);
     fOffsetVar = builder->addUniform(
         GrGLShaderBuilder::kFragment_Visibility |
         GrGLShaderBuilder::kVertex_Visibility,
         kVec2f_GrSLType, "Offset");
     fInvZoomVar = builder->addUniform(
@@ skipping 209 matching lines @@
 
             int x_val = SkPin32(SkScalarFloorToInt(x_interp), 0, width - 1);
             int y_val = SkPin32(SkScalarFloorToInt(y_interp), 0, height - 1);
 
             *dptr = sptr[y_val * width + x_val];
             dptr++;
         }
     }
     return true;
 }