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

src/effects/SkImageSource.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkImageSource.h"
 
 #include "SkCanvas.h"
@@ skipping 46 matching lines @@
     return SkImageSource::Create(image, src, dst, filterQuality);
 }
 
 void SkImageSource::flatten(SkWriteBuffer& buffer) const {
     buffer.writeInt(fFilterQuality);
     buffer.writeRect(fSrcRect);
     buffer.writeRect(fDstRect);
     buffer.writeImage(fImage);
 }
 
-bool SkImageSource::onFilterImage(Proxy* proxy, const SkBitmap& src, const Context& ctx,
-                                  SkBitmap* result, SkIPoint* offset) const {
+bool SkImageSource::onFilterImageDeprecated(Proxy* proxy, const SkBitmap& src, const Context& ctx,
+                                            SkBitmap* result, SkIPoint* offset) const {
     SkRect dstRect;
     ctx.ctm().mapRect(&dstRect, fDstRect);
     SkRect bounds = SkRect::MakeIWH(fImage->width(), fImage->height());
     if (fSrcRect == bounds && dstRect == bounds) {
         // No regions cropped out or resized; return entire image.
         offset->fX = offset->fY = 0;
         return fImage->asLegacyBitmap(result, SkImage::kRO_LegacyBitmapMode);
     }
 
     const SkIRect dstIRect = dstRect.roundOut();
@@ skipping 30 matching lines @@
 void SkImageSource::toString(SkString* str) const {
     str->appendf("SkImageSource: (");
     str->appendf("src: (%f,%f,%f,%f) dst: (%f,%f,%f,%f) ",
                  fSrcRect.fLeft, fSrcRect.fTop, fSrcRect.fRight, fSrcRect.fBottom,
                  fDstRect.fLeft, fDstRect.fTop, fDstRect.fRight, fDstRect.fBottom);
     str->appendf("image: (%d,%d)",
                  fImage->width(), fImage->height());
     str->append(")");
 }
 #endif