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/gl/GrGLShaderBuilder.cpp b/src/gpu/gl/GrGLShaderBuilder.cpp
index a915cfa..e736231 100644
--- a/src/gpu/gl/GrGLShaderBuilder.cpp
+++ b/src/gpu/gl/GrGLShaderBuilder.cpp
@@ -153,9 +153,9 @@
     GrGLSLModulate4f(out, modulation, lookup.c_str());
 }
 
-GrEffect::StageKey GrGLShaderBuilder::KeyForTextureAccess(const GrTextureAccess& access,
-                                                               const GrGLCaps& caps) {
-    GrEffect::StageKey key = 0;
+GrEffect::EffectKey GrGLShaderBuilder::KeyForTextureAccess(const GrTextureAccess& access,
+                                                           const GrGLCaps& caps) {
+    GrEffect::EffectKey key = 0;
 
     // Assume that swizzle support implies that we never have to modify a shader to adjust
     // for texture format/swizzle settings.