Clean up SkImageFilter constructors.

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 26 matching lines @@
 #include "SkGpuDevice.h"
 #endif
 
 static const int kBitmapSize = 4;
 
 namespace {
 
 class MatrixTestImageFilter : public SkImageFilter {
 public:
     MatrixTestImageFilter(skiatest::Reporter* reporter, const SkMatrix& expectedMatrix)
-      : SkImageFilter(0), fReporter(reporter), fExpectedMatrix(expectedMatrix) {
+      : SkImageFilter(0, NULL), fReporter(reporter), fExpectedMatrix(expectedMatrix) {
     }
 
     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:
-    explicit MatrixTestImageFilter(SkReadBuffer& buffer) : SkImageFilter(0) {
+    explicit MatrixTestImageFilter(SkReadBuffer& buffer) : SkImageFilter(0, NULL) {
         fReporter = static_cast<skiatest::Reporter*>(buffer.readFunctionPtr());
         buffer.readMatrix(&fExpectedMatrix);
     }
 
     virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE {
         buffer.writeFunctionPtr(fReporter);
         buffer.writeMatrix(fExpectedMatrix);
     }
 
 private:
@@ skipping 691 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