Simplify flattening to just write enough to call the factory

tests/ImageFilterTest.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
 #include "SkBitmapDevice.h"
 #include "SkBitmapSource.h"
@@ skipping 38 matching lines @@
 
     virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context& ctx,
                                SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE {
         REPORTER_ASSERT(fReporter, ctx.ctm() == fExpectedMatrix);
         return true;
     }
 
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(MatrixTestImageFilter)
 
 protected:
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
     explicit MatrixTestImageFilter(SkReadBuffer& buffer) : SkImageFilter(0, NULL) {
         fReporter = static_cast<skiatest::Reporter*>(buffer.readFunctionPtr());
         buffer.readMatrix(&fExpectedMatrix);
     }
+#endif
 
     virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE {
+        this->INHERITED::flatten(buffer);
         buffer.writeFunctionPtr(fReporter);
         buffer.writeMatrix(fExpectedMatrix);
     }
 
 private:
     skiatest::Reporter* fReporter;
     SkMatrix fExpectedMatrix;
+    
+    typedef SkImageFilter INHERITED;
 };
 
 }
 
+SkFlattenable* MatrixTestImageFilter::CreateProc(SkReadBuffer& buffer) {
+    SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1);
+    skiatest::Reporter* reporter = (skiatest::Reporter*)buffer.readFunctionPtr();
+    SkMatrix matrix;
+    buffer.readMatrix(&matrix);
+    return SkNEW_ARGS(MatrixTestImageFilter, (reporter, matrix));
+}
+
 static void make_small_bitmap(SkBitmap& bitmap) {
     bitmap.allocN32Pixels(kBitmapSize, kBitmapSize);
     SkCanvas canvas(bitmap);
     canvas.clear(0x00000000);
     SkPaint darkPaint;
     darkPaint.setColor(0xFF804020);
     SkPaint lightPaint;
     lightPaint.setColor(0xFF244484);
     const int i = kBitmapSize / 4;
     for (int y = 0; y < kBitmapSize; y += i) {
@@ skipping 762 matching lines @@
 }
 
 DEF_GPUTEST(XfermodeImageFilterCroppedInputGPU, reporter, factory) {
     GrContext* context = factory->get(static_cast<GrContextFactory::GLContextType>(0));
     SkAutoTUnref<SkGpuDevice> device(SkGpuDevice::Create(context,
                                                          SkImageInfo::MakeN32Premul(1, 1),
                                                          0));
     test_xfermode_cropped_input(device, reporter);
 }
 #endif