Adds SVGImageElement as a CanvasImageSource

third_party/WebKit/Source/core/svg/SVGImageElement.h

Index: third_party/WebKit/Source/core/svg/SVGImageElement.h
diff --git a/third_party/WebKit/Source/core/svg/SVGImageElement.h b/third_party/WebKit/Source/core/svg/SVGImageElement.h
index 54db5f4ac6e6f4851779ea2746ece002b1085227..f030602049bcaa6acfee3cb643784dacd2e5912c 100644
--- a/third_party/WebKit/Source/core/svg/SVGImageElement.h
+++ b/third_party/WebKit/Source/core/svg/SVGImageElement.h
@@ -22,6 +22,7 @@
 #define SVGImageElement_h
 
 #include "core/SVGNames.h"
+#include "core/html/canvas/CanvasHTMLSVGImage.h"
 #include "core/svg/SVGAnimatedLength.h"
 #include "core/svg/SVGAnimatedPreserveAspectRatio.h"
 #include "core/svg/SVGGraphicsElement.h"
@@ -31,8 +32,9 @@
 
 namespace blink {
 
-class SVGImageElement final : public SVGGraphicsElement,
-                              public SVGURIReference {
+class CORE_EXPORT SVGImageElement final : public SVGGraphicsElement,
+                                          public CanvasHTMLSVGImage,
+                                          public SVGURIReference {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(SVGImageElement);
 
@@ -51,7 +53,13 @@ class SVGImageElement final : public SVGGraphicsElement,
   }
 
   // Exposed for testing.
-  ImageResourceContent* cachedImage() const { return imageLoader().image(); }
+  ImageResourceContent* cachedImage() const override {
+    return imageLoader().image();
+  }
+
+  // CanvasHTMLSVGImage interface implementation.
+  const Element* element() const override { return this; }
+  bool imageLoaded() const override { return imageLoader().imageComplete(); }
 
  private:
   explicit SVGImageElement(Document&);