Change SkImageFilter's cropRect from SkIRect to a CropRect struct

src/effects/SkColorFilterImageFilter.cpp

Index: src/effects/SkColorFilterImageFilter.cpp
diff --git a/src/effects/SkColorFilterImageFilter.cpp b/src/effects/SkColorFilterImageFilter.cpp
index cfda0b7e752ca50c8a44e618ad535dd11b1639a5..a756a4766cd110ff146c2a63eaa8d78c8efd1516 100755
--- a/src/effects/SkColorFilterImageFilter.cpp
+++ b/src/effects/SkColorFilterImageFilter.cpp
@@ -57,7 +57,7 @@ bool matrix_needs_clamping(SkScalar matrix[20]) {
 };
 
 SkColorFilterImageFilter* SkColorFilterImageFilter::Create(SkColorFilter* cf,
-        SkImageFilter* input, const SkIRect* cropRect) {
+        SkImageFilter* input, const CropRect* cropRect) {
     SkASSERT(cf);
     SkScalar colorMatrix[20], inputMatrix[20];
     SkColorFilter* inputColorFilter;
@@ -76,7 +76,7 @@ SkColorFilterImageFilter* SkColorFilterImageFilter::Create(SkColorFilter* cf,
 }
 
 SkColorFilterImageFilter::SkColorFilterImageFilter(SkColorFilter* cf,
-        SkImageFilter* input, const SkIRect* cropRect)
+        SkImageFilter* input, const CropRect* cropRect)
     : INHERITED(input, cropRect), fColorFilter(cf) {
     SkASSERT(cf);
     SkSafeRef(cf);
@@ -126,7 +126,7 @@ bool SkColorFilterImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& sourc
 }
 
 bool SkColorFilterImageFilter::asColorFilter(SkColorFilter** filter) const {
-    if (cropRect().isLargest()) {
+    if (!cropRectIsSet()) {
         if (filter) {
             *filter = fColorFilter;
             fColorFilter->ref();