Add an SVG DM source

dm/DMSrcSink.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 DMSrcSink_DEFINED
 #define DMSrcSink_DEFINED
 
@@ skipping 230 matching lines @@
 public:
     explicit SKPSrc(Path path);
 
     Error draw(SkCanvas*) const override;
     SkISize size() const override;
     Name name() const override;
 private:
     Path fPath;
 };
 
+#if defined(SK_XML)
+class SVGSrc : public Src {
+public:
+    explicit SVGSrc(Path path);
+
+    Error draw(SkCanvas*) const override;
+    SkISize size() const override;
+    Name name() const override;
+
+private:
+    Path fPath;
+
+    typedef Src INHERITED;
+};
+#endif // SK_XML
 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
 
 class MSKPSrc : public Src {
 public:
     explicit MSKPSrc(Path path);
 
     int pageCount() const override;
     Error draw(SkCanvas* c) const override;
     Error draw(int, SkCanvas*) const override;
     SkISize size() const override;
@@ skipping 166 matching lines @@
 
 class ViaMojo : public Via {
 public:
     explicit ViaMojo(Sink* sink) : Via(sink) {}
     Error draw(const Src&, SkBitmap*, SkWStream*, SkString*) const override;
 };
 
 }  // namespace DM
 
 #endif//DMSrcSink_DEFINED