Hide SkCanvas::{set,get}DrawFilter

include/core/SkCanvas.h

Index: include/core/SkCanvas.h
diff --git a/include/core/SkCanvas.h b/include/core/SkCanvas.h
index d1de626315ee52503517eb84c83e4de231130b64..66741519bf8aa1058f66e7a82d95d8e6309a91db 100644
--- a/include/core/SkCanvas.h
+++ b/include/core/SkCanvas.h
@@ -1149,11 +1149,18 @@ public:
     void drawDrawable(SkDrawable*, SkScalar x, SkScalar y);
 
     //////////////////////////////////////////////////////////////////////////
+#ifdef SK_INTERNAL

[djsollen, 2016/01/21 16:34:27]

why do we need SK_INTERNAL?

[f(malita), 2016/01/21 17:54:16]

The intent is to only hide this for external users.  I figured it'd be nice to
still build & run the related tests/GMs internally, while the feature is still
alive.

+#ifndef SK_SUPPORT_LEGACY_DRAWFLTER
+    #define SK_SUPPORT_LEGACY_DRAWFLTER
+#endif
+#endif
 
+#ifdef SK_SUPPORT_LEGACY_DRAWFLTER
     /** Get the current filter object. The filter's reference count is not
         affected. The filter is saved/restored, just like the matrix and clip.
         @return the canvas' filter (or NULL).
     */
+    SK_ATTR_EXTERNALLY_DEPRECATED("getDrawFilter use is deprecated")
     SkDrawFilter* getDrawFilter() const;
 
     /** Set the new filter (or NULL). Pass NULL to clear any existing filter.
@@ -1164,8 +1171,9 @@ public:
         @param filter the new filter (or NULL)
         @return the new filter
     */
+    SK_ATTR_EXTERNALLY_DEPRECATED("setDrawFilter use is deprecated")
     virtual SkDrawFilter* setDrawFilter(SkDrawFilter* filter);
-
+#endif
     //////////////////////////////////////////////////////////////////////////
 
     /**