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

src/effects/SkColorFilterImageFilter.cpp

Index: src/effects/SkColorFilterImageFilter.cpp
diff --git a/src/effects/SkColorFilterImageFilter.cpp b/src/effects/SkColorFilterImageFilter.cpp
index b5ab255ce71b46fdd9b9582dbfe3f20421f55f0a..1d3cfee1c398fd413f9399f805ee92a82162330f 100755
--- a/src/effects/SkColorFilterImageFilter.cpp
+++ b/src/effects/SkColorFilterImageFilter.cpp
@@ -98,7 +98,11 @@ bool SkColorFilterImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& sourc
                                              const SkMatrix& matrix,
                                              SkBitmap* result,
                                              SkIPoint* loc) {
-    SkBitmap src = this->getInputResult(0, proxy, source, matrix, loc);
+    SkBitmap src = source;
+    if (getInput(0) && !getInput(0)->filterImage(proxy, source, matrix, &src, loc)) {
+        return false;
+    }
+
     SkAutoTUnref<SkDevice> device(proxy->createDevice(src.width(), src.height()));
     SkCanvas canvas(device.get());
     SkPaint paint;