GrCustomStage Renaming Part 4

Rename a bunch of things found by searching for "custom".
Review URL: https://codereview.appspot.com/6765048

git-svn-id: http://skia.googlecode.com/svn/trunk@6085 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/gl/GrGLShaderBuilder.cpp b/src/gpu/gl/GrGLShaderBuilder.cpp
index 217b874..394b42f 100644
--- a/src/gpu/gl/GrGLShaderBuilder.cpp
+++ b/src/gpu/gl/GrGLShaderBuilder.cpp
@@ -100,8 +100,8 @@
 
 void GrGLShaderBuilder::setupTextureAccess(const char* varyingFSName, GrSLType varyingType) {
     // FIXME: We don't know how the effect will manipulate the coords. So we give up on using
-    // projective texturing and always give the stage 2D coords. This will be fixed when custom
-    // stages are responsible for setting up their own tex coords / tex matrices.
+    // projective texturing and always give the stage 2D coords. This will be fixed when effects
+    // are responsible for setting up their own tex coords / tex matrices.
     switch (varyingType) {
         case kVec2f_GrSLType:
             fDefaultTexCoordsName = varyingFSName;