Image filters: de-nest SkImageFilter::Cache and Cache::Key.

src/svg/SkSVGDevice.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkSVGDevice_DEFINED
 #define SkSVGDevice_DEFINED
 
 #include "SkDevice.h"
+#include "SkTemplates.h"
 
 class SkXMLWriter;
 
 class SkSVGDevice : public SkBaseDevice {
 public:
     static SkBaseDevice* Create(const SkISize& size, SkXMLWriter* writer);
 
     SkImageInfo imageInfo() const override;
 
 protected:
@@ skipping 45 matching lines @@
 
     SkXMLWriter*                  fWriter;
     SkAutoTDelete<AutoElement>    fRootElement;
     SkAutoTDelete<ResourceBucket> fResourceBucket;
     SkBitmap                      fLegacyBitmap;
 
     typedef SkBaseDevice INHERITED;
 };
 
 #endif // SkSVGDevice_DEFINED