Add toString methods to SkImageFilter-derived classes

tests/PDFPrimitivesTest.cpp

 /*
  * Copyright 2010 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 "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkData.h"
@@ skipping 425 matching lines @@
 public:
     DummyImageFilter(bool visited = false) : SkImageFilter(0, NULL), fVisited(visited) {}
     virtual ~DummyImageFilter() SK_OVERRIDE {}
     virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&,
                                SkBitmap* result, SkIPoint* offset) const {
         fVisited = true;
         offset->fX = offset->fY = 0;
         *result = src;
         return true;
     }
+    SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(DummyImageFilter)
     bool visited() const { return fVisited; }
 
 private:
     mutable bool fVisited;
 };
 
 SkFlattenable* DummyImageFilter::CreateProc(SkReadBuffer& buffer) {
     SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0);
     bool visited = buffer.readBool();
     return SkNEW_ARGS(DummyImageFilter, (visited));
 }
 
+#ifndef SK_IGNORE_TO_STRING
+void DummyImageFilter::toString(SkString* str) const {
+    str->appendf("DummyImageFilter: (");
+    str->append(")");
+}
+#endif
+
 };
 
 // Check that PDF rendering of image filters successfully falls back to
 // CPU rasterization.
 DEF_TEST(PDFImageFilter, reporter) {
     SkISize pageSize = SkISize::Make(100, 100);
     SkAutoTUnref<SkPDFDevice> device(new SkPDFDevice(pageSize, pageSize, SkMatrix::I()));
     SkCanvas canvas(device.get());
     SkAutoTUnref<DummyImageFilter> filter(new DummyImageFilter());
 
     // Filter just created; should be unvisited.
     REPORTER_ASSERT(reporter, !filter->visited());
     SkPaint paint;
     paint.setImageFilter(filter.get());
     canvas.drawRect(SkRect::MakeWH(100, 100), paint);
 
     // Filter was used in rendering; should be visited.
     REPORTER_ASSERT(reporter, filter->visited());
 }