diff -r 000000000000 -r 6474c204b198 gfx/layers/SharedTextureImage.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/layers/SharedTextureImage.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,50 @@
+/* -*- Mode: C++; tab-width: 20; 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 GFX_SHAREDTEXTUREIMAGE_H
+#define GFX_SHAREDTEXTUREIMAGE_H
+
+#include "GLContextProvider.h"          // for GLContextProvider
+#include "ImageContainer.h"             // for Image
+#include "ImageTypes.h"                 // for ImageFormat::SHARED_TEXTURE
+#include "nsCOMPtr.h"                   // for already_AddRefed
+#include "mozilla/gfx/Point.h"          // for IntSize
+
+// Split into a separate header from ImageLayers.h due to GLContext.h dependence
+// Implementation remains in ImageLayers.cpp
+
+namespace mozilla {
+
+namespace layers {
+
+class SharedTextureImage : public Image {
+public:
+  struct Data {
+    gl::SharedTextureHandle mHandle;
+    gl::SharedTextureShareType mShareType;
+    gfx::IntSize mSize;
+    bool mInverted;
+  };
+
+  void SetData(const Data& aData) { mData = aData; }
+  const Data* GetData() { return &mData; }
+
+  gfx::IntSize GetSize() { return mData.mSize; }
+
+  virtual TemporaryRef<gfx::SourceSurface> GetAsSourceSurface() MOZ_OVERRIDE
+  {
+    return nullptr;
+  }
+
+  SharedTextureImage() : Image(nullptr, ImageFormat::SHARED_TEXTURE) {}
+
+private:
+  Data mData;
+};
+
+} // layers
+} // mozilla
+
+#endif // GFX_SHAREDTEXTUREIMAGE_H