diff --git a/content/canvas/src/CanvasUtils.cpp b/content/canvas/src/CanvasUtils.cpp
index 2a5f8cd92a48..6cf0f538b5a4 100644
--- a/content/canvas/src/CanvasUtils.cpp
+++ b/content/canvas/src/CanvasUtils.cpp
@@ -85,100 +85,5 @@ CoerceDouble(jsval v, double* d)
     return true;
 }
 
-template<size_t N>
-static bool
-JSValToMatrixElts(JSContext* cx, const jsval& val,
-                  double* (&elts)[N], nsresult* rv)
-{
-    JSObject* obj;
-    uint32_t length;
-
-    if (JSVAL_IS_PRIMITIVE(val) ||
-        !(obj = JSVAL_TO_OBJECT(val)) ||
-        !JS_GetArrayLength(cx, obj, &length) ||
-        N != length) {
-        // Not an array-like thing or wrong size
-        *rv = NS_ERROR_INVALID_ARG;
-        return false;
-    }
-
-    for (uint32_t i = 0; i < N; ++i) {
-        jsval elt;
-        double d;
-        if (!JS_GetElement(cx, obj, i, &elt)) {
-            *rv = NS_ERROR_FAILURE;
-            return false;
-        }
-        if (!CoerceDouble(elt, &d)) {
-            *rv = NS_ERROR_INVALID_ARG;
-            return false;
-        }
-        if (!FloatValidate(d)) {
-            // This is weird, but it's the behavior of SetTransform()
-            *rv = NS_OK;
-            return false;
-        }
-        *elts[i] = d;
-    }
-
-    *rv = NS_OK;
-    return true;
-}
-
-bool
-JSValToMatrix(JSContext* cx, const jsval& val, gfxMatrix* matrix, nsresult* rv)
-{
-    double* elts[] = { &matrix->xx, &matrix->yx, &matrix->xy, &matrix->yy,
-                       &matrix->x0, &matrix->y0 };
-    return JSValToMatrixElts(cx, val, elts, rv);
-}
-
-bool
-JSValToMatrix(JSContext* cx, const jsval& val, Matrix* matrix, nsresult* rv)
-{
-    gfxMatrix m;
-    if (!JSValToMatrix(cx, val, &m, rv))
-        return false;
-    *matrix = Matrix(Float(m.xx), Float(m.yx), Float(m.xy), Float(m.yy),
-                     Float(m.x0), Float(m.y0));
-    return true;
-}
-
-template<size_t N>
-static nsresult
-MatrixEltsToJSVal(/*const*/ jsval (&elts)[N], JSContext* cx, jsval* val)
-{
-    JSObject* obj = JS_NewArrayObject(cx, N, elts);
-    if  (!obj) {
-        return NS_ERROR_OUT_OF_MEMORY;
-    }
-
-    *val = OBJECT_TO_JSVAL(obj);
-
-    return NS_OK;
-}
-
-nsresult
-MatrixToJSVal(const gfxMatrix& matrix, JSContext* cx, jsval* val)
-{
-    jsval elts[] = {
-        DOUBLE_TO_JSVAL(matrix.xx), DOUBLE_TO_JSVAL(matrix.yx),
-        DOUBLE_TO_JSVAL(matrix.xy), DOUBLE_TO_JSVAL(matrix.yy),
-        DOUBLE_TO_JSVAL(matrix.x0), DOUBLE_TO_JSVAL(matrix.y0)
-    };
-    return MatrixEltsToJSVal(elts, cx, val);
-}
-
-nsresult
-MatrixToJSVal(const Matrix& matrix, JSContext* cx, jsval* val)
-{
-    jsval elts[] = {
-        DOUBLE_TO_JSVAL(matrix._11), DOUBLE_TO_JSVAL(matrix._12),
-        DOUBLE_TO_JSVAL(matrix._21), DOUBLE_TO_JSVAL(matrix._22),
-        DOUBLE_TO_JSVAL(matrix._31), DOUBLE_TO_JSVAL(matrix._32)
-    };
-    return MatrixEltsToJSVal(elts, cx, val);
-}
-
 } // namespace CanvasUtils
 } // namespace mozilla
diff --git a/content/canvas/src/CanvasUtils.h b/content/canvas/src/CanvasUtils.h
index 9b3603d8ff22..bef1ba7ff5df 100644
--- a/content/canvas/src/CanvasUtils.h
+++ b/content/canvas/src/CanvasUtils.h
@@ -49,18 +49,6 @@ void DoDrawImageSecurityCheck(nsHTMLCanvasElement *aCanvasElement,
 // succeeded.
 bool CoerceDouble(jsval v, double* d);
 
-// Return true iff the conversion succeeded, false otherwise.  *rv is
-// the value to return to script if this returns false.
-bool JSValToMatrix(JSContext* cx, const jsval& val,
-                   gfxMatrix* matrix, nsresult* rv);
-bool JSValToMatrix(JSContext* cx, const jsval& val,
-                   gfx::Matrix* matrix, nsresult* rv);
-
-nsresult MatrixToJSVal(const gfxMatrix& matrix,
-                       JSContext* cx, jsval* val);
-nsresult MatrixToJSVal(const gfx::Matrix& matrix,
-                       JSContext* cx, jsval* val);
-
     /* Float validation stuff */
 #define VALIDATE(_f)  if (!NS_finite(_f)) return false