diff -r 000000000000 -r 6474c204b198 layout/svg/SVGImageContext.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/svg/SVGImageContext.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,47 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MOZILLA_SVGCONTEXT_H_
+#define MOZILLA_SVGCONTEXT_H_
+
+#include "SVGPreserveAspectRatio.h"
+
+namespace mozilla {
+
+// SVG image-specific rendering context. For imgIContainer::Draw.
+// Used to pass information about overridden attributes from an SVG <image>
+// element to the image's internal SVG document when it's drawn.
+class SVGImageContext
+{
+public:
+  SVGImageContext() { }
+
+  SVGImageContext(SVGPreserveAspectRatio aPreserveAspectRatio)
+    : mPreserveAspectRatio(aPreserveAspectRatio)
+  { }
+
+  const SVGPreserveAspectRatio& GetPreserveAspectRatio() const {
+    return mPreserveAspectRatio;
+  }
+
+  bool operator==(const SVGImageContext& aOther) const {
+    return mPreserveAspectRatio == aOther.mPreserveAspectRatio;
+  }
+
+  bool operator!=(const SVGImageContext& aOther) const {
+    return !(*this == aOther);
+  }
+
+  uint32_t Hash() const {
+    return mPreserveAspectRatio.Hash();
+  }
+
+private:
+  SVGPreserveAspectRatio mPreserveAspectRatio;
+};
+
+} // namespace mozilla
+
+#endif // MOZILLA_SVGCONTEXT_H_