Add a transient image filter cache to SkImage::makeWithFilter & PDF

src/pdf/SkPDFDevice.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPDFDevice_DEFINED
 #define SkPDFDevice_DEFINED
 
@@ skipping 163 matching lines @@
 
 protected:
     sk_sp<SkSurface> makeSurface(const SkImageInfo&, const SkSurfaceProps&) override;
 
     void drawAnnotation(const SkDraw&, const SkRect&, const char key[], SkData* value) override;
 
     void drawSpecial(const SkDraw&, SkSpecialImage*, int x, int y, const SkPaint&) override;
     sk_sp<SkSpecialImage> makeSpecial(const SkBitmap&) override;
     sk_sp<SkSpecialImage> makeSpecial(const SkImage*) override;
     sk_sp<SkSpecialImage> snapSpecial() override;
+    SkImageFilterCache* getImageFilterCache() override;
 
 private:
     struct RectWithData {
         SkRect rect;
         sk_sp<SkData> data;
         RectWithData(const SkRect& rect, SkData* data)
             : rect(rect), data(SkRef(data)) {}
         RectWithData(RectWithData&&) = default;
         RectWithData& operator=(RectWithData&& other) = default;
     };
@@ skipping 101 matching lines @@
 
     typedef SkBaseDevice INHERITED;
 
     // TODO(edisonn): Only SkDocument_PDF and SkPDFImageShader should be able to create
     // an SkPDFDevice
     //friend class SkDocument_PDF;
     //friend class SkPDFImageShader;
 };
 
 #endif