Recast draw_filter_into_device as drawDevice

include/core/SkCanvas.h

Index: include/core/SkCanvas.h
diff --git a/include/core/SkCanvas.h b/include/core/SkCanvas.h
index e3b4ffb2446e464f165d5f3a04e6b4b17af02cf2..4d68a8e2264bfb0d70f9d6f96d8572f21efa6270 100644
--- a/include/core/SkCanvas.h
+++ b/include/core/SkCanvas.h
@@ -1420,6 +1420,10 @@ private:
     static bool BoundsAffectsClip(SaveLayerFlags);
     static SaveLayerFlags LegacySaveFlagsToSaveLayerFlags(uint32_t legacySaveFlags);
 
+    static void DrawDeviceWithFilter(SkBaseDevice* src, const SkImageFilter* filter,
+                                     SkBaseDevice* dst, const SkMatrix& ctm,
+                                     const SkClipStack* clipStack);
+
     enum ShaderOverrideOpacity {
         kNone_ShaderOverrideOpacity,        //!< there is no overriding shader (bitmap or image)
         kOpaque_ShaderOverrideOpacity,      //!< the overriding shader is opaque