change more effects to only expose factories

src/effects/SkColorFilterImageFilter.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 "SkColorFilterImageFilter.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkColorMatrixFilter.h"
 #include "SkDevice.h"
 #include "SkColorFilter.h"
 #include "SkReadBuffer.h"
 #include "SkTableColorFilter.h"
 #include "SkWriteBuffer.h"
 
-SkColorFilterImageFilter* SkColorFilterImageFilter::Create(SkColorFilter* cf,
-        SkImageFilter* input, const CropRect* cropRect) {
+SkImageFilter* SkColorFilterImageFilter::Create(SkColorFilter* cf, SkImageFilter* input,
+                                                const CropRect* cropRect) {
     if (nullptr == cf) {
         return nullptr;
     }
 
     SkColorFilter* inputCF;
     if (input && input->isColorFilterNode(&inputCF)) {
         // This is an optimization, as it collapses the hierarchy by just combining the two
         // colorfilters into a single one, which the new imagefilter will wrap.
         SkAutoUnref autoUnref(inputCF);
         SkAutoTUnref<SkColorFilter> newCF(SkColorFilter::CreateComposeFilter(cf, inputCF));
@@ skipping 81 matching lines @@
     if (this->getInput(0)) {
         this->getInput(0)->toString(str);
     }
 
     str->appendf(") color filter: ");
     fColorFilter->toString(str);
 
     str->append(")");
 }
 #endif