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/GrTextureDomainEffect.cpp b/src/gpu/effects/GrTextureDomainEffect.cpp
index bfbab29..1c2ad33 100644
--- a/src/gpu/effects/GrTextureDomainEffect.cpp
+++ b/src/gpu/effects/GrTextureDomainEffect.cpp
@@ -23,7 +23,7 @@
 
     virtual void setData(const GrGLUniformManager&, const GrEffect&) SK_OVERRIDE;
 
-    static inline StageKey GenKey(const GrEffect&, const GrGLCaps&) { return 0; }
+    static inline EffectKey GenKey(const GrEffect&, const GrGLCaps&) { return 0; }
 
 private:
     GrGLUniformManager::UniformHandle fNameUni;