Rename StageKey and related stuff.

R=robertphillips@google.com
Review URL: https://codereview.appspot.com/6785049

git-svn-id: http://skia.googlecode.com/svn/trunk@6130 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/SkMatrixConvolutionImageFilter.cpp b/src/effects/SkMatrixConvolutionImageFilter.cpp
index c650539..a1ece00 100644
--- a/src/effects/SkMatrixConvolutionImageFilter.cpp
+++ b/src/effects/SkMatrixConvolutionImageFilter.cpp
@@ -291,7 +291,7 @@
                         const char* inputColor,
                         const TextureSamplerArray&) SK_OVERRIDE;
 
-    static inline StageKey GenKey(const GrEffect& s, const GrGLCaps& caps);
+    static inline EffectKey GenKey(const GrEffect& s, const GrGLCaps& caps);
 
     virtual void setData(const GrGLUniformManager&, const GrEffect&) SK_OVERRIDE;
 
@@ -415,10 +415,10 @@
 
 };
 
-GrGLEffect::StageKey GrGLMatrixConvolutionEffect::GenKey(const GrEffect& s,
+GrGLEffect::EffectKey GrGLMatrixConvolutionEffect::GenKey(const GrEffect& s,
                                                         const GrGLCaps& caps) {
     const GrMatrixConvolutionEffect& m = static_cast<const GrMatrixConvolutionEffect&>(s);
-    StageKey key = encodeXY(m.kernelSize().width(), m.kernelSize().height());
+    EffectKey key = encodeXY(m.kernelSize().width(), m.kernelSize().height());
     key |= m.tileMode() << 7;
     key |= m.convolveAlpha() ? 1 << 9 : 0;
     return key;