Rename GrAccelData to SkLayerInfo and move it to src/core

include/core/SkPicture.h

Index: include/core/SkPicture.h
diff --git a/include/core/SkPicture.h b/include/core/SkPicture.h
index 41d5c1cdb0283a875273a6eab099be399fc5919d..4bef2b0d2f88a0541813eec4f585e300a7728c28 100644
--- a/include/core/SkPicture.h
+++ b/include/core/SkPicture.h
@@ -46,8 +46,7 @@ public:
     SK_DECLARE_INST_COUNT(SkPicture)
 
     // AccelData provides a base class for device-specific acceleration
-    // data. It is added to the picture via a call to a device's optimize
-    // method.
+    // data. It is added to the picture via EXPERIMENTAL_addAccelData.
     class AccelData : public SkRefCnt {
     public:
         typedef uint8_t Domain;