Change SkImageFilter's cropRect from SkIRect to a CropRect struct

src/effects/SkOffsetImageFilter.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkOffsetImageFilter.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkDevice.h"
 #include "SkFlattenableBuffers.h"
 #include "SkMatrix.h"
 #include "SkPaint.h"
 
 bool SkOffsetImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& source,
                                         const SkMatrix& matrix,
                                         SkBitmap* result,
                                         SkIPoint* loc) {
     SkImageFilter* input = getInput(0);
     SkBitmap src = source;
-    if (cropRect().isLargest()) {
+    if (!cropRectIsSet()) {
         if (input && !input->filterImage(proxy, source, matrix, &src, loc)) {
             return false;
         }
 
         SkVector vec;
         matrix.mapVectors(&vec, &fOffset, 1);
 
         loc->fX += SkScalarRoundToInt(vec.fX);
         loc->fY += SkScalarRoundToInt(vec.fY);
         *result = src;
@@ skipping 31 matching lines @@
     dst->offset(SkScalarRoundToInt(vec.fX), SkScalarRoundToInt(vec.fY));
     return true;
 }
 
 void SkOffsetImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writePoint(fOffset);
 }
 
 SkOffsetImageFilter::SkOffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input,
-                                         const SkIRect* cropRect) : INHERITED(input, cropRect) {
+                                         const CropRect* cropRect) : INHERITED(input, cropRect) {
     fOffset.set(dx, dy);
 }
 
 SkOffsetImageFilter::SkOffsetImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) {
     buffer.readPoint(&fOffset);
 }