Remove SkImageFilter::getInputResult(), since its return value is not

src/effects/SkMorphologyImageFilter.cpp

Index: src/effects/SkMorphologyImageFilter.cpp
diff --git a/src/effects/SkMorphologyImageFilter.cpp b/src/effects/SkMorphologyImageFilter.cpp
index 77299e4f78f16259a0752157f503f3ac50426bf2..be63d15b10ea045f7ec2195950c9f7b6be65a094 100644
--- a/src/effects/SkMorphologyImageFilter.cpp
+++ b/src/effects/SkMorphologyImageFilter.cpp
@@ -136,7 +136,11 @@ static void dilateY(const SkBitmap& src, SkBitmap* dst, int radiusY)
 bool SkErodeImageFilter::onFilterImage(Proxy* proxy,
                                        const SkBitmap& source, const SkMatrix& ctm,
                                        SkBitmap* dst, SkIPoint* offset) {
-    SkBitmap src = this->getInputResult(0, proxy, source, ctm, offset);
+    SkBitmap src = source;
+    if (getInput(0) && !getInput(0)->filterImage(proxy, source, ctm, &src, offset)) {
+        return false;
+    }
+
     if (src.config() != SkBitmap::kARGB_8888_Config) {
         return false;
     }
@@ -181,7 +185,10 @@ bool SkErodeImageFilter::onFilterImage(Proxy* proxy,
 bool SkDilateImageFilter::onFilterImage(Proxy* proxy,
                                         const SkBitmap& source, const SkMatrix& ctm,
                                         SkBitmap* dst, SkIPoint* offset) {
-    SkBitmap src = this->getInputResult(0, proxy, source, ctm, offset);
+    SkBitmap src = source;
+    if (getInput(0) && !getInput(0)->filterImage(proxy, source, ctm, &src, offset)) {
+        return false;
+    }
     if (src.config() != SkBitmap::kARGB_8888_Config) {
         return false;
     }