Revert of Revert of Fix SkTileImageFilter clipping/cropRect interaction issue

src/core/SkImageFilter.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 "SkImageFilter.h"
 
 #include "SkBitmap.h"
@@ skipping 14 matching lines @@
 #include "SkGrPixelRef.h"
 #include "SkGr.h"
 #endif
 
 #ifdef SK_BUILD_FOR_IOS
   enum { kDefaultCacheSize = 2 * 1024 * 1024 };
 #else 
   enum { kDefaultCacheSize = 128 * 1024 * 1024 };
 #endif 
 
+#ifndef SK_IGNORE_TO_STRING
+void SkImageFilter::CropRect::toString(SkString* str) const {
+    if (!fFlags) {
+        return;
+    }
+
+    str->appendf("cropRect (");
+    if (fFlags & CropRect::kHasLeft_CropEdge) {
+        str->appendf("%.2f, ", fRect.fLeft);
+    } else {
+        str->appendf("X, ");
+    }
+    if (fFlags & CropRect::kHasTop_CropEdge) {
+        str->appendf("%.2f, ", fRect.fTop);
+    } else {
+        str->appendf("X, ");
+    }
+    if (fFlags & CropRect::kHasRight_CropEdge) {
+        str->appendf("%.2f, ", fRect.fRight);
+    } else {
+        str->appendf("X, ");
+    }
+    if (fFlags & CropRect::kHasBottom_CropEdge) {
+        str->appendf("%.2f", fRect.fBottom);
+    } else {
+        str->appendf("X");
+    }
+    str->appendf(") ");
+}
+#endif
+
 static int32_t next_image_filter_unique_id() {
     static int32_t gImageFilterUniqueID;
 
     // Never return 0.
     int32_t id;
     do {
         id = sk_atomic_inc(&gImageFilterUniqueID) + 1;
     } while (0 == id);
     return id;
 }
@@ skipping 495 matching lines @@
     }
     return dev;
 }
 
 bool SkImageFilter::Proxy::filterImage(const SkImageFilter* filter, const SkBitmap& src,
                                        const SkImageFilter::Context& ctx,
                                        SkBitmap* result, SkIPoint* offset) {
     return fDevice->filterImage(filter, src, ctx, result, offset);
 }