Implement crop rect for the dilate and erode (morphology) filters. This provoked some cleanup on th…

include/effects/SkMorphologyImageFilter.h

Index: include/effects/SkMorphologyImageFilter.h
diff --git a/include/effects/SkMorphologyImageFilter.h b/include/effects/SkMorphologyImageFilter.h
index def01e8e0a445bf426abb14a84348cdd49c71304..d63f49dab9c8cd2560bed53d3bb100ba4abda1c6 100644
--- a/include/effects/SkMorphologyImageFilter.h
+++ b/include/effects/SkMorphologyImageFilter.h
@@ -14,7 +14,7 @@
 
 class SK_API SkMorphologyImageFilter : public SkImageFilter {
 public:
-    SkMorphologyImageFilter(int radiusX, int radiusY, SkImageFilter* input);
+    SkMorphologyImageFilter(int radiusX, int radiusY, SkImageFilter* input, const SkIRect* cropRect);
 
 protected:
     SkMorphologyImageFilter(SkFlattenableReadBuffer& buffer);
@@ -32,8 +32,10 @@ private:
 
 class SK_API SkDilateImageFilter : public SkMorphologyImageFilter {
 public:
-    SkDilateImageFilter(int radiusX, int radiusY, SkImageFilter* input = NULL)
-    : INHERITED(radiusX, radiusY, input) {}
+    SkDilateImageFilter(int radiusX, int radiusY,
+                        SkImageFilter* input = NULL,
+                        const SkIRect* cropRect = NULL)
+    : INHERITED(radiusX, radiusY, input, cropRect) {}
 
     virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&,
                                SkBitmap* result, SkIPoint* offset) SK_OVERRIDE;
@@ -53,8 +55,10 @@ private:
 
 class SK_API SkErodeImageFilter : public SkMorphologyImageFilter {
 public:
-    SkErodeImageFilter(int radiusX, int radiusY, SkImageFilter* input = NULL)
-    : INHERITED(radiusX, radiusY, input) {}
+    SkErodeImageFilter(int radiusX, int radiusY,
+                       SkImageFilter* input = NULL,
+                       const SkIRect* cropRect = NULL)
+    : INHERITED(radiusX, radiusY, input, cropRect) {}
 
     virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&,
                                SkBitmap* result, SkIPoint* offset) SK_OVERRIDE;