Implement support for expanding crop rects in image filters

src/effects/SkMatrixConvolutionImageFilter.cpp

Index: src/effects/SkMatrixConvolutionImageFilter.cpp
diff --git a/src/effects/SkMatrixConvolutionImageFilter.cpp b/src/effects/SkMatrixConvolutionImageFilter.cpp
index 1df1ff9de0016ca3fe6b3a559c88d8ea4ee376fc..7b9812ddbc30bea4aee2cd976bb0b1eb24b234cd 100644
--- a/src/effects/SkMatrixConvolutionImageFilter.cpp
+++ b/src/effects/SkMatrixConvolutionImageFilter.cpp
@@ -265,9 +265,7 @@ bool SkMatrixConvolutionImageFilter::onFilterImage(Proxy* proxy,
     }
 
     SkIRect bounds;
-    src.getBounds(&bounds);
-    bounds.offset(srcOffset);
-    if (!this->applyCropRect(&bounds, ctx.ctm())) {
+    if (!this->applyCropRect(ctx, proxy, src, &srcOffset, &bounds, &src)) {
         return false;
     }