diff -r 000000000000 -r 6474c204b198 content/canvas/src/CanvasGradient.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/canvas/src/CanvasGradient.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,86 @@
+/* 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_dom_CanvasGradient_h
+#define mozilla_dom_CanvasGradient_h
+
+#include "mozilla/Attributes.h"
+#include "nsTArray.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/dom/CanvasRenderingContext2DBinding.h"
+#include "mozilla/dom/CanvasRenderingContext2D.h"
+#include "mozilla/gfx/2D.h"
+#include "nsWrapperCache.h"
+#include "gfxGradientCache.h"
+
+namespace mozilla {
+namespace dom {
+
+class CanvasGradient : public nsWrapperCache
+{
+public:
+  NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(CanvasGradient)
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(CanvasGradient)
+
+  MOZ_BEGIN_NESTED_ENUM_CLASS(Type, uint8_t)
+    LINEAR = 0,
+    RADIAL
+  MOZ_END_NESTED_ENUM_CLASS(Type)
+
+  Type GetType()
+  {
+    return mType;
+  }
+
+  mozilla::gfx::GradientStops *
+  GetGradientStopsForTarget(mozilla::gfx::DrawTarget *aRT)
+  {
+    if (mStops && mStops->GetBackendType() == aRT->GetType()) {
+      return mStops;
+    }
+
+    mStops =
+      gfx::gfxGradientCache::GetOrCreateGradientStops(aRT,
+                                                      mRawStops,
+                                                      gfx::ExtendMode::CLAMP);
+
+    return mStops;
+  }
+
+  // WebIDL
+  void AddColorStop(float offset, const nsAString& colorstr, ErrorResult& rv);
+
+  JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE
+  {
+    return CanvasGradientBinding::Wrap(aCx, this);
+  }
+
+  CanvasRenderingContext2D* GetParentObject()
+  {
+    return mContext;
+  }
+
+protected:
+  CanvasGradient(CanvasRenderingContext2D* aContext, mozilla::css::Loader *aLoader, Type aType)
+    : mContext(aContext)
+    , mCSSLoader(aLoader)
+    , mType(aType)
+  {
+    SetIsDOMBinding();
+  }
+
+  nsRefPtr<CanvasRenderingContext2D> mContext;
+  nsTArray<mozilla::gfx::GradientStop> mRawStops;
+  mozilla::RefPtr<mozilla::gfx::GradientStops> mStops;
+  mozilla::css::Loader* mCSSLoader; // not ref counted, it owns us
+  Type mType;
+  virtual ~CanvasGradient() {}
+};
+
+MOZ_FINISH_NESTED_ENUM_CLASS(CanvasGradient::Type)
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_CanvasGradient_h