--- a/gfx/2d/2D.h
+++ b/gfx/2d/2D.h
@@ -1176,18 +1176,16 @@ public:
   /*
    * This creates a new tiled DrawTarget. When a tiled drawtarget is used the
    * drawing is distributed over number of tiles which may each hold an
    * individual offset. The tiles in the set must each have the same backend
    * and format.
    */
   static TemporaryRef<DrawTarget> CreateTiledDrawTarget(const TileSet& aTileSet);
 
-  static bool DoesBackendSupportDataDrawtarget(BackendType aType);
-
 #ifdef XP_MACOSX
   static TemporaryRef<DrawTarget> CreateDrawTargetForCairoCGContext(CGContextRef cg, const IntSize& aSize);
   static TemporaryRef<GlyphRenderingOptions>
     CreateCGGlyphRenderingOptions(const Color &aFontSmoothingBackgroundColor);
 #endif
 
 #ifdef WIN32
   static TemporaryRef<DrawTarget> CreateDrawTargetForD3D10Texture(ID3D10Texture2D *aTexture, SurfaceFormat aFormat);

--- a/gfx/2d/Factory.cpp
+++ b/gfx/2d/Factory.cpp
@@ -425,33 +425,16 @@ Factory::CreateTiledDrawTarget(const Til
 
   if (!dt->Init(aTileSet)) {
     return nullptr;
   }
 
   return dt.forget();
 }
 
-bool
-Factory::DoesBackendSupportDataDrawtarget(BackendType aType)
-{
-  switch (aType) {
-  case BackendType::DIRECT2D:
-  case BackendType::DIRECT2D1_1:
-  case BackendType::RECORDING:
-  case BackendType::NONE:
-  case BackendType::COREGRAPHICS_ACCELERATED:
-    return false;
-  case BackendType::CAIRO:
-  case BackendType::COREGRAPHICS:
-  case BackendType::SKIA:
-    return true;
-  }
-}
-
 TemporaryRef<ScaledFont>
 Factory::CreateScaledFontForNativeFont(const NativeFont &aNativeFont, Float aSize)
 {
   switch (aNativeFont.mType) {
 #ifdef WIN32
   case NativeFontType::DWRITE_FONT_FACE:
     {
       return new ScaledFontDWrite(static_cast<IDWriteFontFace*>(aNativeFont.mFont), aSize);