Move SkMatrixImageFilter into core, and add a factory fn for it.

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"
 #include "SkChecksum.h"
 #include "SkDevice.h"
 #include "SkLazyPtr.h"
+#include "SkMatrixImageFilter.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
 #include "SkRect.h"
 #include "SkTDynamicHash.h"
 #include "SkTInternalLList.h"
 #include "SkValidationUtils.h"
 #if SK_SUPPORT_GPU
 #include "GrContext.h"
 #include "SkGrPixelRef.h"
 #include "SkGr.h"
@@ skipping 337 matching lines @@
     // loop, but then return false on the next filter.
     *dst = bounds;
     return true;
 }
 
 bool SkImageFilter::asFragmentProcessor(GrFragmentProcessor**, GrTexture*, const SkMatrix&,
                                         const SkIRect&) const {
     return false;
 }
 
+SkImageFilter* SkImageFilter::CreateMatrixFilter(const SkMatrix& matrix,
+                                                 SkFilterQuality filterQuality,
+                                                 SkImageFilter* input) {
+    return SkMatrixImageFilter::Create(matrix, filterQuality, input);
+}
+
 #if SK_SUPPORT_GPU
 
 void SkImageFilter::WrapTexture(GrTexture* texture, int width, int height, SkBitmap* result) {
     SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);
     result->setInfo(info);
     result->setPixelRef(SkNEW_ARGS(SkGrPixelRef, (info, texture)))->unref();
 }
 
 bool SkImageFilter::getInputResultGPU(SkImageFilter::Proxy* proxy,
                                       const SkBitmap& src, const Context& ctx,
@@ skipping 106 matching lines @@
 
 SkImageFilter::Cache* SkImageFilter::Cache::Create(size_t maxBytes) {
     return SkNEW_ARGS(CacheImpl, (maxBytes));
 }
 
 SK_DECLARE_STATIC_LAZY_PTR(SkImageFilter::Cache, cache, CreateCache);
 
 SkImageFilter::Cache* SkImageFilter::Cache::Get() {
     return cache.get();
 }