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/gpu/effects/GrConfigConversionEffect.cpp b/src/gpu/effects/GrConfigConversionEffect.cpp
index 652c6bc..b6a69f2 100644
--- a/src/gpu/effects/GrConfigConversionEffect.cpp
+++ b/src/gpu/effects/GrConfigConversionEffect.cpp
@@ -58,7 +58,7 @@
         GrGLSLMulVarBy4f(&builder->fFSCode, 2, outputColor, inputColor);
     }
 
-    static inline StageKey GenKey(const GrEffect& s, const GrGLCaps&) {
+    static inline EffectKey GenKey(const GrEffect& s, const GrGLCaps&) {
         const GrConfigConversionEffect& effect = static_cast<const GrConfigConversionEffect&>(s);
         return static_cast<int>(effect.swapsRedAndBlue()) | (effect.pmConversion() << 1);
     }