Goodbye GrEffectRef.

Also, reworked some var names and comments around SkShader::asNewEffect.

R=robertphillips@google.com

Author: bsalomon@google.com

Review URL: https://codereview.chromium.org/374923002
diff --git a/src/gpu/GrBitmapTextContext.h b/src/gpu/GrBitmapTextContext.h
index 5be2e99..b9d5ce7 100644
--- a/src/gpu/GrBitmapTextContext.h
+++ b/src/gpu/GrBitmapTextContext.h
@@ -47,7 +47,7 @@
     void*                       fVertices;
     int32_t                     fMaxVertices;
     GrTexture*                  fCurrTexture;
-    SkAutoTUnref<GrEffectRef>   fCachedEffect;
+    SkAutoTUnref<GrEffect>      fCachedEffect;
     uint32_t                    fEffectTextureGenID;
     int                         fCurrVertex;
     SkRect                      fVertexBounds;