diff -r 000000000000 -r 6474c204b198 content/canvas/src/WebGLShaderPrecisionFormat.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/canvas/src/WebGLShaderPrecisionFormat.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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 WEBGLSHADERPRECISIONFORMAT_H_
+#define WEBGLSHADERPRECISIONFORMAT_H_
+
+#include "WebGLObjectModel.h"
+
+namespace mozilla {
+
+class WebGLBuffer;
+
+class WebGLShaderPrecisionFormat MOZ_FINAL
+    : public WebGLContextBoundObject
+{
+public:
+    WebGLShaderPrecisionFormat(WebGLContext *context, GLint rangeMin, GLint rangeMax, GLint precision) :
+        WebGLContextBoundObject(context),
+        mRangeMin(rangeMin),
+        mRangeMax(rangeMax),
+        mPrecision(precision)
+    {
+    }
+
+    JSObject* WrapObject(JSContext *cx);
+
+    // WebIDL WebGLShaderPrecisionFormat API
+    GLint RangeMin() const {
+        return mRangeMin;
+    }
+    GLint RangeMax() const {
+        return mRangeMax;
+    }
+    GLint Precision() const {
+        return mPrecision;
+    }
+
+    NS_INLINE_DECL_REFCOUNTING(WebGLShaderPrecisionFormat)
+
+private:
+    // Private destructor, to discourage deletion outside of Release():
+    ~WebGLShaderPrecisionFormat()
+    {
+    }
+
+    GLint mRangeMin;
+    GLint mRangeMax;
+    GLint mPrecision;
+};
+
+} // namespace mozilla
+
+#endif