Mark existing image filter entry points that will be going away with Deprecated

src/core/SkMatrixImageFilter.cpp

Index: src/core/SkMatrixImageFilter.cpp
diff --git a/src/core/SkMatrixImageFilter.cpp b/src/core/SkMatrixImageFilter.cpp
index dd9e79f2ccfa39a26951ae3f6f505d9d320b20e1..5a585efffcff62cc9456aa841eb26b2d4201db3a 100644
--- a/src/core/SkMatrixImageFilter.cpp
+++ b/src/core/SkMatrixImageFilter.cpp
@@ -46,14 +46,14 @@ void SkMatrixImageFilter::flatten(SkWriteBuffer& buffer) const {
 SkMatrixImageFilter::~SkMatrixImageFilter() {
 }
 
-bool SkMatrixImageFilter::onFilterImage(Proxy* proxy,
-                                        const SkBitmap& source,
-                                        const Context& ctx,
-                                        SkBitmap* result,
-                                        SkIPoint* offset) const {
+bool SkMatrixImageFilter::onFilterImageDeprecated(Proxy* proxy,
+                                                  const SkBitmap& source,
+                                                  const Context& ctx,
+                                                  SkBitmap* result,
+                                                  SkIPoint* offset) const {
     SkBitmap src = source;
     SkIPoint srcOffset = SkIPoint::Make(0, 0);
-    if (!this->filterInput(0, proxy, source, ctx, &src, &srcOffset)) {
+    if (!this->filterInputDeprecated(0, proxy, source, ctx, &src, &srcOffset)) {
         return false;
     }