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

src/effects/SkMergeImageFilter.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkMergeImageFilter.h"
 #include "SkCanvas.h"
 #include "SkDevice.h"
@@ skipping 37 matching lines @@
     this->initModes(modes);
 }
 
 SkMergeImageFilter::~SkMergeImageFilter() {
 
     if (fModes != SkTCast<uint8_t*>(fStorage)) {
         sk_free(fModes);
     }
 }
 
-bool SkMergeImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src,
-                                       const Context& ctx,
-                                       SkBitmap* result, SkIPoint* offset) const {
+bool SkMergeImageFilter::onFilterImageDeprecated(Proxy* proxy, const SkBitmap& src,
+                                                 const Context& ctx,
+                                                 SkBitmap* result, SkIPoint* offset) const {
     int inputCount = this->countInputs();
     if (inputCount < 1) {
         return false;
     }
 
     SkIRect bounds;
 
     SkAutoTDeleteArray<SkBitmap> inputs(new SkBitmap[inputCount]);
     SkAutoTDeleteArray<SkIPoint> offsets(new SkIPoint[inputCount]);
     bool didProduceResult = false;
 
     // Filter all of the inputs.
     for (int i = 0; i < inputCount; ++i) {
         inputs[i] = src;
         offsets[i].setZero();
-        if (!this->filterInput(i, proxy, src, ctx, &inputs[i], &offsets[i])) {
+        if (!this->filterInputDeprecated(i, proxy, src, ctx, &inputs[i], &offsets[i])) {
             inputs[i].reset();
             continue;
         }
         SkIRect srcBounds;
         inputs[i].getBounds(&srcBounds);
         srcBounds.offset(offsets[i]);
         if (!didProduceResult) {
             bounds = srcBounds;
             didProduceResult = true;
         } else {
@@ skipping 77 matching lines @@
     for (int i = 0; i < this->countInputs(); ++i) {
         SkImageFilter* filter = this->getInput(i);
         str->appendf("%d: (", i);
         filter->toString(str);
         str->appendf(")");
     }
 
     str->append(")");
 }
 #endif